It is often a good idea to include a transition word or phrase in a topic sentence to help readers understand the relationship between the previous paragraph and the new one that has begun.

True.

Explanation:

Transition words are the words that help transition from one point to another. In other words, transition words are linking words that show the relationship between paragraphs or sentences.

The inclusion of transition words or phrases in a topic sentence is often a good idea because it helps readers understand the relationship between the sentences or paragraphs. This means that when transition words or phrases are used in between paragraphs, the readers can easily understand the connection between the two paragraphs.

Thus, the correct answer is true.

i think the answer would mist likely be an adjective clause, because unhappy is an adjective.