Answer:
D. in the past few decades, carbon dioxide levels have been falling.
Answer:
A measure of how much water vapor there is in the air.
Explanation:
Dampness, especially that of the air.
The amount of water vapour in the air.
Hope it will help you :))
They can only produce cells that are the same as them
Answer:
D
Explanation:
A robin building a nest is not learned or taught like the others. It is just instinctive for robins to build nests.
