Question

select the word that means become weaker. pheidole dentata, an ant of the southeastern united states, is unique when it comes to age. scientists studying the ant found that older worker ants were able to do tasks just as well as younger ants. this is not the case for most animal species. humans, for example, see their abilities to do many tasks decline with age.

Explanation:

To find the word meaning "become weaker", we analyze the context. The passage says older worker ants of Pheidole dentata perform tasks as well as younger ones, unlike most species (e.g., humans) where abilities "decline with age". "Decline" here means abilities become weaker over time.

Answer:

decline