A topic sentence introducing a main fact followed by supporting details should appear in (5 points) A -the introduction paragraph
B -the conclusion paragraph
C -one of the body paragraphs
D -each of the body paragraphs
Lach

D.

Explanation:

A topic sentence can be defined as a sentence that sums up the main idea of a text or paper. A topic sentence sepcifies the topic to be clarified in the paragraph.

A topic sentence appears in every paragraph of a text. By stating topic sentence in every paragraph, the writer specifies the main idea that  he/she will discuss in the paragraph.

Therefore, from the given options, correct one is D.

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.

what lesson are you referencing?