The correct answer is:
D. They portray human relationships to nature.
Explanation:
Basically, He is absolutely known for his scene compositions and his rural landscapes are notable because it is useful in explaining the changing definition of nature during the industrial revolution and later in the century this would become the primary subject of the Impressionists. Constable solicited a great measure of certainty in many classes and in fact, he was the first artist we know of who studied meteorology so that the clouds and the mysterious conditions that he performed were reliably precise.
See
Lots of Artist like Landscape Artist,Portrait Artist, and Art Students are given stuff to draw from just seeing what it looks like so that is my best guess
Red green orange blue yellow