They have very similar meanings. "Death-mark'd love" is pretty self explanatory, and "star-cross'd lovers" are lovers that are fated for doom. This basically foreshadows the fate of Romeo and Juliet and what will likely happen to them due to their forbidden love. Unfortunately I don't have the prologue on me nor did I read it in a very long time, so I can't provide evidence. But that's basically what it is trying to say.
It would show exactly how the man is feeling. And how he would react to a certain situation
Answer:1. The quarterback nearly released the ball during the final minute of the game.
2. Laura assisted her family at their store every weekend and vacation.
3. We rode through two states to see the autumn foliage.
4. The teacher was not impressed by the lack of class participation.
5. Ben mislaid his biology book at home yesterday.
6. William purchased costly shoes that are too tight.
Explanation: I hope this helps you, I wasn't entirely sure what your teacher wanted, but I tried.