Final answer:
Clastic sedimentary rock textures are described by grain shape, grain size, and grain sorting, which help interpret the rock’s history, such as transportation distance and depositional environment.
Step-by-step explanation:
The textures of clastic sedimentary rocks are described in terms of several characteristics. Grain size, grain shape, and grain sorting are all important factors used to classify these rocks. Grain size can indicate the distance and height from which sediments have traveled. The grain shape can reflect how far sediment has been transported and its past environmental interactions, such as water or wind erosion, which tend to make grains more rounded the further they are transported. Grain sorting describes how uniform the sizes of the grains are within the rock, with well-sorted indicating similar grain sizes and poorly sorted indicating a mixture of grain sizes.
In summary, the following options from the question are correct: A. Grain shape, C. Grain size, and D. Grain sorting. Option B. Grain source is not typically described in terms of rock texture but rather as part of provenance studies, which look at the origin of the sediments before they become sedimentary rock.