What is the effect of lines 13- through 15 in the poem

Dogs make wonderful pets because they us stay happy and healthy. the topic sentence is "dogs make wonderful pets." , is this correct? i keep doubting myself.

This is a set of words that begins with a preposition.

Iquickly discovered that the tour guide, as well as the park rangers, were tired of people's abuse of the grand mesa's precious resources, which is protected by the state of colorado. current measures allow colorado to prosecute people who do not follow park rules.which verb in the students rough draft is incorrect and needs to be changed during the editing process? a. discoveredb. werec. isd. allow