Question

jaguars and snakes! luckily, capybaras can hide underwater for five minutes at a time. plus, their webbed toes help them paddle fast.
capybaras live in central and south america, usually in groups of between ten and forty. they eat plants like grass, reeds, grains, melons, and squash. they eat a lot of tough plants that are rich in fiber. to help break the plants down, capybaras have long teeth that chew side to side. they also have special bacteria in their guts that help break down fiber.
though capybaras are happiest in the wild, they are easily trained. zookeepers have taught these gentle rodents to walk onto scales to be weighed, go into crates, and sit still for physical exams. how do they do it? food treats and belly rubs are fun rewards. capybaras are so quick to learn that one was once used as a guide animal for a blind man in suriname.
the capybara population is mostly stable, but capys are still threatened by deforestation. when large areas of trees are cleared, it reduces the capybaras shelter. but now, people are starting to limit the number of trees people can cut in rain forests. this is good news for capybaras, as their home is being protected.
which sentence correctly describes capybaras?
they are the closest relatives of the hippopotamus.
they are shy animals that usually hide in tall grass.
they are wild guinea pigs that live in mountain forests.
they are large rodents that are powerful swimmers.

Explanation:

The text states capybaras can hide underwater for five - minutes at a time and their webbed toes help them paddle fast, and they are gentle rodents. This supports the idea that they are large rodents and powerful swimmers. There is no mention of them being closest relatives of hippopotamus, hiding in tall grass, or living in mountain forests.

Answer:

They are large rodents that are powerful swimmers.