These are his pencils. is this correct?

yes only if i could see da pictures

explanation:

yes those are his pencils.

explanation:

those are his pencils because they aren't his pens.

hope this .

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.