I think the answer is:
B. Chemical Change.
Answer:
a
Explanation:
it is A because h20 and c02 are molecules while what make them up are atoms
The population would decrease, the more predators there are the more food needed for the species .
This is because oxygen (2.8.6) requires two electrons on its valence shell to attain stable configuration (2.8.8). Hydrogen (1) on the other hand requires one electron on its valence shell to attain stable configuration (2). Therefore in a covalent bond, it requires two hydrogen and one oxygen to share electrons and achieve stable configuration.
