I think is the second one not sure yet
Answer:
What keeps humans motivated on a regular basis.
Explanation:
depending on what you want to have a main focus on for the last part of the sentence you can change.
example
what keeps humans motivated to go to the gym
what keeps humans motivated to continue on in school.
The answer is that it's unified.
The choices are:
Brutus and Cassius argue over bribes; it explains why Brutus is unwilling to trust Cassius, and why he insists upon marching to Philippi.
Brutus and Portia argue over the best way to kill Caesar; it shows that the roles for women in Roman society were quite limited.
Cassius argues with Brutus over the best military strategy; it demonstrates why Cassius would be a better leader than Brutus.
Antony states that Brutus was Rome's most noble man; it shows that Antony is a man of ambition who is no more fit to rule than Cassius or Caesar.
I think the answer is Brutus and Cassius argue over bribes; it explains why Brutus is unwilling to trust Cassius, and why he insists upon marching to Philippi.