Benefits of getting water from the river and underground

water from the river and underground is less likely to get contaminated and polluted. (more info below)

Explanation:

Benefits of ground water The usage of ground water for drinking purposes has some benefits: ground water is usually not contaminated because it is removed from sewage. The water is recycled by sand and stones. Groundwater is located underground in large aquifers and must be pumped out of the ground after a deep well is drilled. Surface water is found in lakes , rivers and streams and is drawn by intake into the public water supply. Groundwater is water in or through a subsurface layer of soil or rock.

hope I helped!

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.