It is estimated that ___ percent of the world’s landslides occur in the Himalayas.

Correct option is C

It is estimated that about 30% of the world's landslides occur in the Himalayas, due to the region's steep slopes, seismic activity, and frequent monsoon rains.
Explanation:
· (a) 10 – This is an underestimation of the number of landslides occurring in the Himalayas.
· (b) 20 – This value is still lower than the actual estimated percentage.
· (c) 30 – Correct answer. The Himalayas are prone to landslides due to their geography, and around 30% of the world's landslides occur in this region.
· (d) 40 – This is an overestimate of the percentage of landslides in the Himalayas.