Explain the importance of random sampling. What problems/limitations could prevent a truly random sampling and how can they be prevented?

Simple random sampling
Simple random sampling (also known as SRS in short form) is a process where random
sample is selected from population. Sample is a subset of population. Croxton, F. E., & Cowden,
D. J. (1939).
For example, if I select a randomly 100 students from my college and conduct...