Answer:
i believe that the awnser is A
Explanation:
Its called osmosis and it only happens with water. now I'm just adding words to be able to post this. its moving down the concentration gradient.
Food - increase in height
Predators - fast reproduction, fast in general
Heat/lack of water - Cam photosynthesis, storage of water
Predator/prey arms war - sensors along side to detect prey, sense of smell, etc
C.) Uracil is your answer.....
