Solution:
A teacher teaching his students and earning a salary is an example of Economic activity.Every person keeps himself busy with some activity to satiate human needs; these pursuits are referred to as human activities. These activities fall under the categories of economic and non-economic activities, respectively. Economic activities are those carried out to make money or accumulate wealth, whereas non-economic activities are those carried out for free with the intention of serving others. A teacher who works at a school earns money in exchange for the services they give. While working from home as a nurse or doctor does not result in any money, these types of activities are classified as non-economic activities.