Cats are smaller and can hide in small places, they sleep more and eat less.
Dogs are bigger depending on the breed. They bark instead of meowing and they eat more and sleep less
I don't know which word is underlined, so I will just write every part of speech.
Rain is a noun.
Began is a linking verb.
To is an empty word.
Fall is a verb.
Or to fall could be seen as a verb, you don't have to separate them.
But again, you didn't underline anything, so I don't know for sure.
Answer:
Boosts the environment, but kills too...
Explanation: