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: The topic sentence
Explanation: If the text is properly written, the topic sentence should either be at the beginning of the paragraph/text, or the end, if it is a short text; for things like the heading or title; words in special print; repeated words; things reiterated by pronouns; or ideas being suggested.
the answer would be A SATIRE because satire means the use of humor, irony, exaggeration, or ridicule to expose and criticize people's stupidity or vices, particularly in the context of contemporary politics and other topical issues.
Answer: Julius Caesar Act 3, Scene 1.
Explanation: Brutus Stabs and Kills Caesar.