He was looking for India, and he had thought he reached the rich country of India when he landed in the americas, Hence why native americans are called "indians"
North Korea is urging other nations increasing military to spread and getting worse.
Answer:
1. The following case is an example of observational study. Researchers monitor the impact of a hazard variable, diagnostic test, therapy, and other treatment without attempting to influence who is or is not subjected to it in unobtrusive studies. Observational studies include cohort investigations and case control investigations.
2. It is wrong to state that watching TV for more than 2 hours is the only reason for low scores. There can be a number of factors such as genetic ability to childhood uprising environment which might not be impacted by the subject population.
