Question

therefore no vegetation ___4___. It is dry, hot, waterless and without shelter.

• A. is growing
• B. grow
• C. has grown
• D. grows

Answer 1

The correct option is D grows

Here, 'grows' in simple present tense is correct because it implies a general truth. Here, the truth is that due to absence of rains, there is no growth of vegetation.
'Is growing' in present continuous tense is incorrect because it is used to express an action going on as we speak. Example: He is growing vegetables for his household in his kitchen garden.
'Has grown' in present perfect tense is incorrect because it is used to indicate an action that started in the past and has continued up till now. Example: He has grown big size roses on his farm.
Usage of 'grow' is incorrect because it does not fit in the sentence.