Question

reduce the sentence.
during the summer months
of june, july and august,
the thing i like to do is go
swimming in water.

Explanation:

To reduce the sentence, we simplify redundant phrases. "During the summer months of June, July and August" can be shortened to "In summer", "the thing I like to do" to "my favorite activity", and "go swimming in water" to "swim". Combining these, we get a concise version.

Answer:

In summer, my favorite activity is to swim.