Select the correct meaning of the underlined word in the sentence.

The rain will cease at sundown.

Hold fast or stick.

In this context, "adhere" means to stick or hold fast to something. The sentence suggests that it was important for the mailing label to securely stick to the package. By adhering to the package, the label ensures that the box doesn't become lost during transit.

In this context, "labile" refers to the patient's condition being unstable or prone to rapid and unpredictable changes.

The sentence suggests that the patient's health or medical status is fluctuating, and as a result, the nurses were instructed to closely monitor him. The word "labile" is often used in a medical context to describe a condition or state that is variable and can change quickly. Therefore, option B, "Rapidly changing," is the correct answer.

Convex.

The term "concave" refers to a surface or shape that curves inward or is rounded inward, like the inside of a bowl. In the context of the sentence, it indicates that the child's chest had a shape that was curved inward rathe r than being flat or rounded outward. The opposite of concave is convex, which means curved outward or bulging.

Therefore, option B, "Convex," is the correct answer.

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.