<u>Answer:</u>
Alluvial fans are evidence that the Death Valley is a tectonically active region.
<u>Explanation:</u>
- Alluvial fans can be only formed by the slow and gradual depositional action of a river.
- But for an alluvial to be formed, it is primarily necessary for the river to continuously carry and deposit sediments for a long period of time.
- The supply of sediments done by the Death Valley in California provides evidence that it is a tectonically active region.
Answer:
the world is the earth we live in
Answer: Big boulders are found in the headland because deposition is occurring in this area.
Explanation:
Erosion can be defined as the loss of top most fertile layer of the soil due to the action of the agents like water and wind. The coastal area is prone to erosion due to high water tides and strong wind currents. Boulder beaches are created due to erosion in the coastal area. The erosion and sedimentation of the bedrock and sediments left on the shore due to upwelling of oceanic water are the common causes of development of boulders.
Answer:
B.
C.
Explanation:
Factors control the cooling time of magma within the crust include surface water passing over the magma and the depth at which the magma cool.
Surface water passing over the magma absorbs the water and carries away heat and magma present in depths is cooler than surface because magma rises to earth surface due to high pressure and that is hot.
Hence, the correct option is "B. and C."