▶️ Answer/Explanation
Method 1 describes intensive farming, where animals are kept in confined spaces. Because their movement is restricted, they lose less energy through muscle contraction and heat generation. This allows more of the energy from their food to be diverted toward growth and the production of meat, milk, or eggs. Consequently, there is an increased yield of animal product per unit of feed. While options (A), (B), and (C) are often consequences of intensive farming, they are disadvantages rather than advantages. Therefore, the primary benefit for the producer is the efficiency of production.
✅ Answer: (D)
✅ Answer: (D)
▶️ Answer/Explanation
✅ Answer: (B) fewer habitats in the same area
Intensive farming aims to maximize output from a given area, often through monocultures, heavy chemical inputs, and land clearing. A major environmental disadvantage is the loss of biodiversity due to habitat destruction. As natural landscapes are converted entirely to agricultural use, shelters, food sources, and breeding grounds for native wildlife are eliminated. Options (A), (C), and (D) describe advantages of intensive farming (lower costs, labor efficiency, and land efficiency). Therefore, the clear disadvantage is the reduction in available habitats within the farmed area.
▶️ Answer/Explanation
Statement $1$ is correct because machinery like tractors and harvesters allows farmers to manage much larger fields more quickly than manual labor. Statement $3$ is also correct as selective breeding creates animals with higher yields, such as cows that produce more milk or chickens that grow faster. However, statement $2$ is incorrect; herbicides are designed to kill weeds, which decreases competition for the crop plants, allowing them to access more nutrients and light. Therefore, only statements $1$ and $3$ are valid methods for increasing food production.
✅ Answer: (C)
✅ Answer: (C)