The question asks you to understand the meanings of two underlined words from a passage about termites: 'mounds' and 'tunnels'. Let's break down the meanings of these words and choose the correct options.
Mounds :
In the context of the passage, 'mounds' refer to structures created by termites with mud. Therefore, they are best understood as 'small hills that insects build with mud'. The context of termite mounds indicates that they are larger structures built with purpose for the termites to reside or perform activities in. Hence, Option B, 'small hills that insects build with mud', is the correct choice.
Tunnels :
In the passage, 'tunnels' are described as routes within the mounds where termites can move around. Therefore, 'tunnels' can be accurately described as 'passages'. These allow for movement within the mound and are essential for the function of the termite society. Hence, Option A, 'passages', is the correct choice.
By considering the context in which these words are used within the given sentences, it's clear that the correct meanings for 'mounds' is 'small hills that insects build with mud', and for 'tunnels' is 'passages'.