El sector primario de la economía, que se encarga de proveer los productos relacionados directamente con la tierra, contempla actividades como A la prestación de servicios bancarios
B la transformación de materias primas.
C el suministro de servicios de comunicación.
D la agricultura, la ganadería, la pesca y la minería.

Explanation:

The functions performed by the primary sector are necessary to ensure the conservation of the population. For example, agriculture and livestock are activities that guarantee the production of most of the raw materials used, almost always, by the secondary sector, to make products intended for human consumption.

In this way, the products produced by the primary sector are indispensable so that the other sectors, within the production chain, can develop their work.

Examples of primary sectore

Breeding and reproduction of livestock,such as cows for the marketing of beef.

Breeding fish as raw material for feeding.

Planting and felling of trees for the manufacture of furniture.

Sowing and harvesting soybeans.

Breeding of sheep for the manufacture of wools and fabrics.

Mining for jewelry manufacturing.

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