<span>B. Abrasion. Wind erosion occurs when wind is strong enough to rip out plants and other materials which can destabilize the ground. This mostly occurs on large, flat and sandy surfaces. Strong wind can be a major problem for farming because of this.</span>
There was more interest and curiosity with led to discovery.
Factories introduced many innovations regarding the production of goods most of it being that large scale production was enabled. Factories created many job opportunities for the colonies and the colonies started mass producing.
It is the concrete operational stage as far as I know.