Thaw and defrost are synonyms. What happens to a frozen thing when it thaws/defrosts.
It melts/becomes unfrozen/warms up/becomes soft.
In the sentence 'Be careful not to fall!' is the word 'fall' a noun or a verb?
A verb.
How does the North American Wood Frog survive the winter?
It lets its body freeze and then sleeps/hibernates all winter.
What are the four seasons?
Spring, summer, autumn (Fall), winter
Is a science article fiction or non-fiction?
Non-fiction
In which season are most baby animals born?
Spring.
When you say what you think about something, you are giving your....
opinion.
In the sentence 'Fall is a beautiful season' is 'fall' a noun or a verb?
It is a noun.
Questions start and finish with what?
Start with a capital letter, and finish with a question mark (?)