What are two ways places can be grouped to form a region?.

regions are formed based on physical and cultural

Explanation:

physical regions are defined by landforms such as the soil, climate, and the natural vegetation.

cultural regions are defined by language, politics, industry etc.

i only have part a but here is the first one: - lewis and clark are born

- lewis marries sacajawea and clark is jealous  

- clark drowns lewis and then goes to jail

answer; substantive law;