the word "bi" means two
the word "quad" means four
so, this means: "biped" is a animal that has about 2 legs and quadruped is a/an animal with four legs
just break down the words into groups, it might come to you!
the word "ostrich" is a large TWO-toed bird
so, your answer MIGHT be a kitten (cat)
good luck on your assignment and enjoy your day!
~MeIsKaitlyn:)