Question

read the passage.
the humane society of the united states hsus is headquartered in washington, dc, and was founded by a group of journalists in 1954. the organization employs 528 workers. it is the 136th - largest charity in the united states and boasts over 1,500 volunteers. the humane societys mission focuses on five issues: factory farming, animal fighting, the fur trade, puppy mills, and wildlife abuse. less than a decade ago, the hsus began pursuing global work through an affiliate. today there are staff members working in 17 different nations.
which use of brackets would improve the clarity of this passage?
less than a decade ago, the hsus began pursuing global work work outside of the united states through an affiliate.
less than a decade ago, the hsus began pursuing global work through an affiliate humane society international.
less than a decade eight years ago, the hsus began pursuing global work through an affiliate.
less than a decade ago, the hsus humane society of the united states began pursuing global work through an affiliate.

Explanation:

Brackets are used to provide additional, clarifying information. In the context of the passage, when introducing an affiliate, specifying its name (Humane Society International) within brackets helps the reader understand which affiliate is being referred to. The other options either repeat already - known information (like restating "Humane Society of the United States" when it's already clear from the passage's start) or provide less - relevant clarification (such as defining "global work" as "work outside of the United States" which is redundant as "global" already implies that, or specifying "eight years" when "less than a decade" is a common and acceptable time frame without needing that specific number in this context).

Answer:

Less than a decade ago, the HSUS began pursuing global work through an affiliate [Humane Society International].