How do secondary activities differ from primary activities?

Secondary activities differ from primary activities in that they involve the processing and manufacturing of raw materials into finished goods, while primary activities focus on extracting natural resources directly from the Earth. For example, farming and fishing are primary activities where raw materials like crops or fish are obtained. In contrast, textile production or iron smelting are secondary activities where raw materials such as cotton or iron ore are transformed into fabric or steel. Secondary activities add value to raw materials through industrial processes, creating products for consumption or further use, whereas primary activities provide the basic raw materials needed for these processes.

This question related to Chapter 14 Social Science Class 6th NCERT.
From the Chapter 14. Economic Activities Around Us.
Give answer according to your understanding.