Final answer:
The correct answer is d. none of the above. Irrigation, selective breeding, and livestock are all agricultural techniques.
Step-by-step explanation:
The correct answer is d. none of the above. Irrigation, selective breeding, and livestock are all agricultural techniques. Irrigation involves supplying water to crops to help them grow.
Selective breeding is the process of breeding plants or animals with desired traits to produce offspring with those traits. Livestock refers to the raising of animals for various agricultural purposes such as meat, milk, or wool production.