How can the process of determining the truth help us in our search for knoledge?

What is most likely impact of clearing natural landscape to construct high rise buildings

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.

What is donald trump wanting to build and have finished by 2020?