Answer:
They needed to get goods that they needed
Explanation
Because there are no major rivers, Greeks had to plant grapes, olive, fruit trees, and nut trees.
Answer: I think the answer you have is right.
Explanation: The trenches were uncomfortable, muddy, and cold ditches dug into the ground where soldiers lived and shot from, they helped to protect the soldiers from getting shot and killed, but didn't keep them entirely safe, so there were still death in the trenches.
Why endure all that if they didn't believe in what they were fighting for, like the answer you have.
I hope this helps!
If it did, would you mind marking brainliest :)