Why was it a good thing for people to be able to get/keep food around permanently (didn’t have to constantly look for it)? [early man and RVC review}

Why is illegal immigration a controversial issuea. people think that the current laws on immigration address the issue well.b. there are far fewer illegal immigrants each year than naturalized citizens.c. americans disagree on weather immigration law should change to address it.d. most naturalized citizens first entered the united states as illegal immigrants.