Question

which statement best explains how the delta at the mouth of this river was formed? a. deposition is a destructive force that uses the flow of the water in the river to move sediment to the mouth of the river. b. deposition is a constructive force that uses the flow of the water in the river to move sediment to the mouth of the river. c. weathering is a destructive force that uses the flow of the water in the river to move sediment to the mouth of the river. d. weathering is a constructive force that uses the flow of the water in the river to move sediment to the mouth of the river.

Explanation:

To determine the correct answer, we analyze each option:

• Option A: Deposition is a constructive (not destructive) process as it builds up landforms like deltas. So A is incorrect.
• Option B: Deposition is a constructive force. Rivers carry sediment (via their flow) and deposit it at the mouth, forming deltas. This matches the delta formation process.
• Option C: Weathering breaks down rocks (destructive) but doesn't move sediment to form deltas; erosion and deposition are involved in moving sediment. So C is incorrect.
• Option D: Weathering is destructive, and it doesn't move sediment to form deltas. So D is incorrect.

Answer:

B. Deposition is a constructive force that uses the flow of the water in the river to move sediment to the mouth of the river.