Which word means to place under observation?

Stumbled.

The word "staggered" in this context means to walk unsteadily, as if about to fall. It suggests a lack of balance or coordination, often due to being under the influence of alcohol or being drunk.

To address a section of a fence that is falling apart, a homeowner would need to buttress it. "Buttress" means to reinforce or support something, often by adding additional structural support. In the context of the falling-apart fence, the homeowner would need to provide additional support or repair the section to prevent it from collapsing further. The options "flounder," "degrade," and "hinder" do not convey the appropriate action needed to address the situation with the fence.

Stop

In the given sentence, "cease" means that the rain will come to an end or stop. It suggests that the rain will no longer be falling after sundown. Therefore, option D, "Stop," is the correct answer.

In this context, the word "discrete" means separate or distinct.

It suggests that the person had three distinct symptoms that were not overlapping or connected. The doctor created an elaborate plan of care based on each individual symptom. The word "discrete" emphasizes the separateness and individuality of the symptoms.