Which choice is more common in rural areas than urban areas?

a) - open grasslands
b) - pollution
c) -factories
d) -dense population

Open grasslands are more common in rural areas than urban areas.

Explanation:

Open grasslands are most common in rural areas because in urban areas lands are used for industrialisation,urbanisation and many more other developing sites. In rural areas, Lands are still vacant for agricultural activities.

One of the reasons for finding open grasslands in rural areas is because people are migrating to urban areas. People think that they earn more in industries than in agriculture. Most of the animals are found in rural areas so for their feeding purpose, grasslands are required in rural areas.

c.) slabs of ocean floor return to the mantle in subduction zones.