The correct answer is D. Working as a diamond or gold miner in South Africa
Because it is the only answer that has anything to do with agriculture.
The correct opcion is C. The job that is an example of an agricultural activity in the informal sector is working as a vendor at a market for homegrown produce.
The informal sector refers to the selling of the products grown in the agricultural activity.
Agriculture is the science and art that refers to cultivation on soil and the rearing of livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities.
