Which part of the formula is the argument?

The part of the formula in which is the argument is in the parentheses

for example:
=SUM(B1:B3)
(B1:B3) is the argument

If ana decided to be against in prioritizing the task in her to do list, she will likely have insufficient time in doing the things in which she wouldn't be able to finish and in the same way, she won't be able to finish all of the task that she needed to do.