Describe the process of learning to ride a bicycle first as an example of continuous development, then as an example of discontinuous/stage-like development.

Is even more difficult to analyze because of the lack of cues in computer mediated communication.

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

The controlled use of fire by hominids: (a) limited the expansion of hominids into certain environments, such as dry grasslands. (b) decreased the amount of food energy available in the hominid diet. (c) contributed to geographical expansion and food production techniques in positive ways. (d) has been shown to contribute little to the digestive process of hominids.