The location of the center of our galaxy was first determined by observations of select one: a. the sun. b. black holes. c. the motions of nearby stars. d. the spiral arms. e. globular clusters

The location of the center of our galaxy was first determined by observations of globular clusters.

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question - how does mountainous terrain affect settlements in a region? choose all answers that are correct.

groups trade with each other regularly.

people travel from settlement to settlement.

why: since they travel to go trade or visit it may be harder to get there because of the mountainous terrain.

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the following sets of characteristics describe what we know about the outer plants is c. rocky surface, closet to the sun and larger in size