Answer:
he is going
Explanation:
he is going he is not going
he is playing he is not playing
The topic sentence for the paragraph above is A. Sentence 1. A topic sentence is supposed to give the general idea of a paragraph. Sentence 1 briefly describes what and where plates are in the Earth's crust. The rest of the sentences give more detail about tectonic plates.
Might be C. In the beginning they state they know little about their friend.