Answer:
The first portion: Ultimately pointless as it was fierce and acrimonious, means that that it was as much of a waste of time as it was aggressive and fueled by fury. Second they acknowledge that it was not that the couldn't prevent it but they didn't know what happened.
Explanation:
The answer is desire! I hope this helps!
We use pronouns so that...
we are not repetitive.
they can provide variety.
they can provide an economy of words.