Please help me!! The river valleys of the Tigris-Euphrates, the Nile, and the Indus were centers of civilization because they

a. had rich deposits of iron ore and coal

b. were isolated from other cultural influences

c. were easy to defend from invasion

d. provided a means of transportation and irrigation

An outcome of which rerutions) resulted in conflict and a temporary return to absolute de

What is the difference between direct learning and indirect learning? a. direct learning is independent learning that people pursue on their own. indirect learning is forced on the learner by others, such as parents or teachers. b. direct learning is forced on learners so that they'll become productive members of society. indirect learning is a voluntary action taken by the learner with the intention of becoming a productive member of society. c. when people learn culture directly, they are imitating and observing others. when people learn culture indirectly, they are being taught by someone else. d. when people learn culture directly, they are being taught by someone else. when people learn culture indirectly, they are learning through observation and imitation.

Which of these is not a criticism of the concentric zone model? it does not accurately describe cities after the rise of suburban development. it only applies to cities that grew after the development of the automobile. it assumes that inner-city areas will always be repurposed instead of abandoned. it places too much importance on the traditional central business district.