Which of the following is a physical process which most significantly impacts the physical characteristic of the earth?

In the diagram below, ab and bc are tangent to o. what is the measure of

Mosses, lichens and shrubs can be found where in russia? a.grasslands b.mountain regions c.coastal plains d.siberian tundra

Put these ecosystems in order of least biodiversity to most biodiversity 1. mediterranean forest 2. indonesian rain forest 3. arctic ocean