Classify if each sentence according to whether or not it uses consistent verb mood.

Indicative: The first president of the United states was George Washington. The indicative form is used to express simple statements.

Imperative: Pick up all of your dirty clothes off the floor right now!.  Write a thank you letter to your grandmother for your birthday gift. The imperative form is used to give orders.

Conditional: If I had enough money, I would travel around the world. The conditional form is used to express a wish or a situation that depends on another.

Subjunctive: I wish rotary phones were still in use. The subjunctive is used to express a wish or a hypothetical situation.

Explanation: it's right

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; i believe that the correct answer is (scientific data);