Mahatma Gandhi gave great importance to village life.
He believed that villages represented a natural, healthy, and self-sufficient unit of social organization.
So Assertion (A) is correct.
Gandhi also supported decentralisation.
He believed that power and production should not be concentrated in large industrial centres only.
Instead, local self-rule and village-based economy should be encouraged.
So Reason (R) is also correct.
Reason (R) explains why Gandhi considered the village a safe and sane unit of human association.
Therefore, both (A) and (R) are correct, and (R) is the correct explanation of (A).