I can think of two reasons to reject "D". I am not sure that they are correct or not.
1) According to the first sentence. Logging is a process in which trees are removed from selected area. It is a general statement. Hence, it requires simple present tense, which is clearly present in "B" rather than "D".
2) Verb+ing modifier after comma used in the choice "D" has Subject "Such work" for "removing" and "burning". It indicates
...
1) According to the first sentence. Logging is a process in which trees are removed from selected area. It is a general statement. Hence, it requires simple present tense, which is clearly present in "B" rather than "D".
2) Verb+ing modifier after comma used in the choice "D" has Subject "Such work" for "removing" and "burning". It indicates
...
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