Manufacturing involves a full array of production from handicrafts to moulding iron and steel and stamping out plastic toys to assembling delicate computer components or space vehicles. In each of these processes, the common characteristics are the application of power, mass production of identical products and specialised labour in factory settings for the production of standardised commodities. Manufacturing may be done with modern power and machinery, or it may still be very primitive.

The above passage talks about which kind of activity ?

Secondary 

The above passage talks about manufacturing industry which comes under "secondary activity".