3. One reason the Tigris and Euphrates, the Nile, and the Indus river valleys supported the earliest civilizations was because these regions contained *
O 1. Considerable rainfall and dense forests
2. Plateaus that provided means of transportation
0 3. Fertile soil, annual flooding, and irrigation
4. Rich deposits of oil and iron

u

explanation:

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.

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.

that would be the steamboat because none of the other things are forms of transportation