Question

what is the primary component of earth’s system responsible for weathering and erosion?
○ a. hydrosphere
○ b. geosphere
○ c. biosphere
○ d. atmosphere

how do living organisms in the biosphere affect the geosphere?
○ a. by absorbing harmful solar radiation
○ b. through biological weathering and soil formation
○ c. by shaping coastlines through erosion
○ d. by distributing heat through convection

Explanation:

First Question:

The hydrosphere (water in all forms) drives weathering (e.g., water erosion, freeze - thaw) and erosion (e.g., river, ocean erosion). Geosphere is the solid Earth, biosphere is life, atmosphere is air. So hydrosphere is primary for weathering/erosion.

Living organisms (biosphere) affect geosphere via biological weathering (e.g., plant roots breaking rocks) and soil formation (organic matter addition). Option a is atmosphere/ozone, c is hydrosphere, d is atmosphere. So b is correct.

Answer:

a. Hydrosphere

Second Question: