A geographer is interested in studying how and why the environments of the Amazon Rainforest and the Andes Mountains are different. Which essential element of geography would the geographer use to complete this research? A. human systems
B. physical systems
C. places and regions
D. uses of geography

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

How do convection currents form underwater mountains?

Why did the united states lead a coalition to invade iraq in 1991? o a. there was a fundamentalist revolution in iraq. o b. iraq had invaded iran. o c. an oil embargo had started in the middle east, o d. iraq had invaded kuwait.