Plzz answer 5 Easy-question And if you got it right I mark you a Brainliest(picture) if you don’t answer it and put something Nonsense I will report you

Science Mysteries: Why Do People Yawn?Science has given humans many amazing devices and useful bits of knowledge. We know so much about our bodies and how to stay healthy, for example. We also know how to make machines and devices that make life easy for us. Scientists dedicate their lives to knowledge, but even with a lifetime commitment, sometimes scientists fail to find all the answers. One mystery that still remains unsolved is why we yawnwhat makes us yawn and what purpose it serves.Recent studies suggest that we yawn when we get tired as a way to encourage our brains. The theory is that yawning helps cool the brain, allowing it to work more efficiently. According to WebMD's article about these studies, when you yawn, your jaw muscles get stretched, increasing blood flow to your neck, face, and head. Also a deep breath during the yawn forces spinal fluid and blood down from the brain. The cool air then cools down these fluids.Other scientists believe, however, that yawning is a form of communication. This theory attempts to explain why yawning seems to spread from person to person. This kind of behavior is called "contagious yawning" and carries with it a possible social message. Scientists are not yet sure what exactly the message is, but they believe people who have more social empathy are more likely to start yawning when they see someone else yawning.Scientists will continue to investigate the mystery of the yawn. Is it a leftover behavior from before humans had language? Was it a "Hey, I'm sleepy. Let's go to sleep" message? Or is it really just a way to keep our brains cool? While this behavior still is largely a mystery, one thing is certain: you are probably fighting the urge to yawn right about now.Which word from the text best describes scientists' understanding of the yawn?a. Mystery b. Breath c. Language d. Message 2008 crisis question. Besides the construction of buildings , state twouses of rocks.Can any one help me Quel bananes as-tu manges ?CorrectIncorrect answers for both boxes please Work out the percentage change when a price of 40 is decreased to 18. What are some benefits of countries to make pipelines? A piece of wood is 0.9 metres long.It is cut into three unequal pieces.The first piece is 0.2 metres longer than the second piece.The third piece is 23 hundredths of a metre shorter than the second piece.How long is each piece of wood? The graph of the system of equationsx + 2y = 83x + 6y = 13will give:A. parallel linesB.lines that coincideC.perpendicular linesD.none of these FIND THE INDEPENDENT & DEPENDENT VARIABLE!- the amount of iron in blood depends on the amount of red meat a person eats. A spinner has three unequal sections: red, yellow, and blue. The table shows the results of Nolan's spins.Find the experimental probability of landing on each color. Enter your answers as simplified fractions.ColorRed: 13Yellow: 10Blue: 5FrequencyThe probability of landing on red isThe probability of landing on yellow isThe probability of landing on blue is Winter Break 2020 was one of the worst ______________ Winter Break I have ever experienced please give me 3 sentence or a praghgrah PLZZZZ just plzz Question 1Simplify5y - 2y + y + y Plz, Help me with this question? What is the exponential expression for the numerical expression 3333 ? 43 434 124 34 Aliyah spent $27 on nine fancy pens.How much did each pen cost? how do i answer this please? Unlike the American Revolution, the Haitian wasA. Unsuccessful B. Led by masses of poor peopleC. Fought against the United States D. Achieved through armed resistance When did life change for Skara Brae? help please ! so i can finish this assignment