I’m guessing the answer would be the second one!
A robin flying south for the winter
Answer:
Carbondioxide and water
Explanation:
During respiration food molecules are broken down to release energy. During this process oxygen is required and not formed but Carbondioxide and water is liberated as byproduct. So the closest answers are Carbondioxide and water
Answer:
The garden.
Explanation:
There is more organisms doing photosynthesis(the process turning sunlight, water, and carbon dioxide into energy and oxygen) in the garden because there are more plants in the area.
The change would most likely result in a dip in #