Select the most appropriate option to fill in blank no. 4.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3, i.e., for.
So, the sentence reads correctly as:
"...are essential for holistic rural development."
Explanation:
The phrase "essential for" is a common collocation used to indicate something necessary to achieve or support something else. Here, sustainable agriculture technologies are necessary for holistic rural development.
Final sentence:
"Sustainable agriculture, in (3)________ food security, rural employment and environmentally sustainable technologies, such as soil conservation, sustainable natural resource management and biodiversity protection, are essential for holistic rural development."