Ye shall be my witnesses.
Verb:
Kind of Verb:

verb: "run"

kind of verb: present tense or future

sentence:

"i run to the street" (present tense)

"i will run to the street" (future; key word is WILL)

verb: "ran"

kind of verb: past-tense (it happened in the past)

sentence: "he ran to the street"

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.

answer: c

explanation: