Which human activity uses the most water? a. transportation, b. irrigation, c. drinking, d. mining.

Step 1: Define the Problem

Identify which human activity among the given options uses the most water.

Step 2: Break Down the Problem

Examine each option to determine its water usage:

• a. Transportation
• b. Irrigation
• c. Drinking
• d. Mining

Step 3: Apply Relevant Concepts

Consider the typical water usage associated with each activity:

• Transportation: Generally involves minimal direct water usage.
• Irrigation: Involves large-scale water use for agriculture.
• Drinking: Involves relatively small amounts of water per person.
• Mining: Can involve significant water use, but typically less than irrigation.

Step 4: Analysis, Verify and Summarize

Analyze the water usage:

• Irrigation is known to be the largest consumer of water globally, primarily for agricultural purposes.

Final Answer

b. irrigation