Killing individuals with undesirable traits could strengthen an overall population. It's basically artificial selection, or man made evolution. Think of breeding dogs, you let the dogs with the most desirable traits breed, while you kill off (or prevent from breeding) the runts.
Liberal issues focuses on the individual rights and equality of the people while conservatism focuses on socially entrenched and old values and virtues especially family and religious values.
For example, if an issue about abortion was to be prompted a liberal would focus on the rights of the mother vis a vis the child while the conservative would allude to socially held notions especially those held by the dominant religion.
Answer: Export
Explanation: Imperialism made latin american economies largely dependent on the export of raw materials to european countries.
Sampling, mark and recapture, indirect observation, and direct observation
