Concept:The sector contributing most to the economy is the primary sector, which provides the main raw materials and employs a large share of the population.
Explanation:The primary sector is also known as extractive occupations.
It includes farming, fishing, mining, forestry, and quarrying.
In many developing economies, this sector employs about 65 percent of the workers.
It forms the base of production by supplying raw materials to other sectors.
Therefore, among the given options, the primary sector contributes highly to the economy.
Answer:A. Primary sector