Which of the following is a tertiary activity?

The correct option is Shoe shining.

Economic activities are broadly classified into three main sectors based on the nature of the work:

1. Primary Sector: Involves the extraction and harvesting of natural resources directly from the earth. Examples include farming, fishing, and extracting minerals.

2. Secondary Sector: Involves manufacturing, processing, and construction where raw materials are converted into finished products. Examples include steel making and metal working.

3. Tertiary Sector: Involves providing services to individuals and businesses rather than producing goods directly. Examples include transportation, healthcare, education, and personal services like shoe shining.

Since shoe shining is a service-oriented activity, it falls under the tertiary sector.