Question

lack of sleep essay
persuasive essay outline
introduction
thesis statement:
lack of sleep is a problem because it can cause sleeplessness, anxiety, and loss of focus during the day.
body paragraph 1:
topic sentence

which should be used for the topic sentence of body paragraph 1?
drinking a cup of warm milk is my favorite way to settle down for bed.
butterflies are a relaxing topic to think about when you are stressed out.
firstly, lack of sleep can cause you to feel sleepy during the day.
body paragraph 2:
topic sentence
conclusion

Explanation:

The essay is about the impacts of lack of sleep. The body paragraph 1's topic sentence should relate to the effects of lack of sleep. The first option is about a sleep - aiding method (warm milk), the second is about a stress - relieving topic (butterflies), while the third option ("Firstly, lack of sleep can cause you to feel sleepy during the day") directly addresses an effect of lack of sleep, which is relevant to the essay's theme.

Answer:

The third option: "Firstly, lack of sleep can cause you to feel sleepy during the day"