The vague pronoun is "it"
Answer: Nothing
Explanation:Literally nothing right now.XD
<span><span>anonymous </span> 3 years ago</span>daddy, a singular collective noun's example; a swarm of bees.
Since it functions as a unit, we use a singular verb . EG; In that funny movie, a swarm of bees chases an old man.
They are examples of evidence
D. To highlight that a physical activity requires a body to use energy
The word expenditure in the excerpt is simply stating that the body uses energy during physical activity. It doesn't describe how much energy since that can be different depending on the level of physical activity. Because it doesn't include how much, options B and C are both wrong. Also, expenditure is not a type of activity, so this also eliminates A.