2d. Identify the extent to which skeletons are reliable sources of evidence for understanding civilizations in the Americas pre-1600 by circling reliable, somewhat reliable, or unreliable, then explain why you chose that option.

Reliable.

Explanation:

Skeletons of ancient organisms are the most reliable sources of evidence for understanding civilizations in the Americas pre-1600 because these skeletons of organisms provide information about the occurrence of different types of animals in the regions. Fossils of different organisms helps us to know the history as well as the geographical distribution of animals in the region so we can conclude that skeletons of animals are the reliable source of evidence.

.

explanation:

because it !