How was religion used to justify imperialism

The defendant, angered because a rival gang member had twice beaten him up after school, obtained a heavy lead pipe and waited in a deserted alleyway which he knew the rival took as a route home every day after school. when his enemy came walking down the alley, the defendant leapt out behind him and smashed the pipe into the victim's head, knocking him to the ground. the defendant then rolled the victim over and pounded his face with 15 to 20 heavy blows with the lead pipe, killing him. the jurisdiction defines first degree murder as murder committed with premeditation and deliberation. all other murders are defined as second degree murders. why will the defendant be convicted of first degree murder (as opposed to second degree murder)?

36) the mississippians were considered to be horticulturalists, which means they were a) native americans. b) hostile to non-mississippians. c) people who relied on hunting and gathering. d) people who grew plants, fruits, and vegetables. 37) wine rice indigo silk this list represents the major crops grown in colonial georgia. what crop should correctly be placed in the blank space? a) potatoes b) poultry c) tobacco d) tomatoes

This is for my social studies guide and i can answer 21/22 of it perfectly fine. but can someone tell me what the caste system was, and what divisions/classes that it was apart of it?