16. The primary purpose of respiration is to (A) Use up oxygen
(B) Produce carbon dioxide
(C) Break down food substances
(D) Release energy from food substances

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this

the answer is c because it is most logical.

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.