can someone help me rephrase and shortend these sentences into one topic sentence?
All immigrants come from poverty and risk their life's crossing the border. Some do not make it, and some even lose limbs. All immigrants take these risks out of necessity. They are running away from starvation, wars or violence and are desperately looking for better opportunities.
here is what my professor is asking
Identify one of the issues facing immigrants either before they arrive or after. Then, argue how that issue should be considered in the ongoing debate over U.S. immigration policy.
It looks like the issue you focused on was: poverty. You should first decide if it is a push or pull factor in immigration. Your first sentence assumes that all immigrants are coming to America because of poverty. If that is your assumption, then you need some data to back it up. Your other assumption is that all immigration is from Latin American countries, which would be misleading.
Your topic sentence should focus on poverty as a main factor of immigration. To do this, your topic sentence should have the reasons why poverty is a factor in immigration. For example: Immigrants facing poverty in their home country often choose the United States of America because of its unique opportunities for the individual to advance their economic situation.
The above sentence does not specifically address what your professor wants, but you can see that as a topic sentence, I can use the rest of the paragraph to show what opportunities there are for an immigrant to advance their economic situation.