I believe the answer is "A". Please correct me.

Which statement best describes the role of animals in the water and carbon cycles?

Select one:
a. Animals release carbon dioxide and water vapor as a by‐product of cellular respiration.
b. Animals release carbon dioxide and water vapor as a by‐product of photosynthesis.
c. Animals take in carbon dioxide and oxygen during cellular respiration.
d. Animals use oxygen to perform photosynthesis and release carbon dioxide as a by‐product.

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.

Pls ! in your opinion, what are the limiting factors that might affect the growth or diversity of our ecosystem? respond to this question in claim, evidence, reasoning format. 1. make your claim (i are the limiting factors that might affect the growth or diversity of our 2. follow the claim with 3 pieces of evidence. evidence may be taken from the reading, the videos, previous lessons, or googled answers. site sources, too. 3. use reasoning to explain why you chose your evidence.

Why are current extinctions of concern to enviromentalists?