Answer: Die is feminine. Der is masculine. Das is neuter/neutral.
Explanation:
Sausage, or Wurst in German, is a feminine noun, so it is said as, "die wurst".
Cheese, or Käse in German, is a masculine noun, so it is said as "der Käse".
Egg, or Ei in German, is a neuter noun, so it is said as, "das Ei".
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