What are the pairs i need them before i can try to answer
I'd say A: tidal waves. B, C, and D don't really seem to fit for me.
Answer: Gray whales are the common ancestor of the Blue and Humpback whales.
Ancestors of Blue whale include: Gray?
During the day, plants carry out photosynthesis releasing carbon dioxide. During the night, there isn't any sunlight so the plants carry out cellular respiration releasing oxygen.
The answer is b, numerous meaning more in amount