76. Which of the following is a type of livestock that is commonly used for egg production?
a) Chickens
b) Cows
c) Sheep
d) None of the above
77. What is the term for the process by which bacteria convert organic matter into methane gas?
a) Composting
b) Digestion
c) Methanogenesis
d) None of the above
78. Which of the following is a type of pesticide that is derived from natural sources?
a) Synthetic pesticide
b) Chemical pesticide
c) Organic pesticide
d) None of the above
79. What is the term for the practice of using water from natural sources to irrigate crops?
a) Greywater irrigation
b) Rainwater harvesting
c) Surface water irrigation
d) None of the above
80. Which of the following is a type of farming that involves growing crops in water without soil?
a) Aquaculture
b) Hydroponics
c) Aeroponics
d) None of the above
