Question

review the paragraph about the function of the appendix. the appendix is a small sac attached to the large intestine, and for many years, most medical experts believed that it had no real function in the human body. for a long time, most doctors believed the appendix was essentially useless. more recently, however, research has begun to suggest that the organ may play a role in the early development of the human endocrine system, which secretes important hormones into the bloodstream. scientists also believe the appendix may help people maintain a healthy immune system. these researchers believe the appendix may provide a space for white blood cells to interact with harmful antigens, creating helpful antibodies in the process. in addition, the appendix may also hold an emergency supply of helpful bacteria, which can be used to repopulate the gut’s microbiome after an illness. why should the bolded sentence be removed? it provides information that is off topic. it provides information that is redundant.

Explanation:

The first sentence of the paragraph already states "for many years, most medical experts believed that it had no real function in the human body". The bolded sentence "For a long time, most doctors believed the appendix was essentially useless" repeats this idea, so it's redundant. The information isn't off - topic as it's still about the appendix's perceived lack of function, but it's just repeating what was already said.

Answer:

It provides information that is redundant.