Which of the following statements is true? Choose one:

A. Conglomerates consist of a single grain size.

B. An immature clastic rock has well-sorted, resistant grains.

C. A well-sorted clastic rock is made up of different-sized particles.

D. Pieces of broken rock produced by physical weathering are collectively called clasts or detritus.

Option (D)

Explanation:

Physical weathering is usually defined as the process by which the rocks are broken down without the alteration of its chemical composition. These are caused by factors such as wind, precipitation, and temperature. Some of the examples of physical weathering are exfoliation, freeze-thaw method and thermal expansion as well as contraction method.

The eroded materials produced from physical weathering are commonly known as clasts or detritus. These are carried away from one place to another by agents such as wind, water, and ice.

Thus, the correct answer is option (D), which is true.