I'd say A.
The word "describing" or almost anything ending with "ing" signifies an action occuring now, or in the present. B, C, and D use "when describing" which leads to the assumption that these things listed are taken into account while the landscape is being described but answer choice A uses "when they describe" which is passive rather than active.
Answer:
D
Explanation:
A-C would make great details in the report, but they do not explain his opinion on the topic (the VALUE of field trips).
A meaningful quote and/or a universal idea could serve as hooks for the introuction of a literary analysis.
An analgy or metaphor is typically used in a compare contrast essay, a definition of terms is more for a research paper as is a startling fact.
Answer:
Dolomite Sand is used for constructions it is harmful to your health