Which was a result of improved farming techniques and food surpluses? O Complex cities with large buildings sprang up very quickly.
O Some people could focus on different kinds of work.
O Men began to domesticate wild animals.
O Families had fewer children on average.

Complex cities with large buildings sprang up very quickly.

Explanation:

The cities may experience food insecurity because of the development of infrastructure in cities is likely to encourage the rural public to obtain the facilities. The demand of food supplies is likely to increase. The food is basic need which is a area of concern for every person obtaining habitat in the cities. This is responsible for improvement in farming techniques and food surpluses.

idk you know what i mean hahahaha

can you attach the answer options