Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct option that best fits each of the numbered blanks from 19 to 24.

Sustainable Farming Practices

In recent years, farmers around the world have been focusing on sustainable farming practices. One key issue is ___(1)___ the amount of water used for crops. In many regions, water is a limited resource, and farmers must ___(2)___ careful planning to ensure they do not waste it. Another challenge is maintaining the quality of the soil. Over-farming can lead to soil degradation, making it ___(3)___ to grow healthy crops in the future.
Despite these challenges, there are many innovative solutions. Some farmers are using natural methods to control pests, rather than relying on ___(4)___ chemicals. Others are experimenting with crop rotation and cover crops to improve soil health. These methods not only help the environment but also ___(5)___ the farm's long-term productivity. Sustainable farming is essential for feeding a growing population while ___(6)___ the planet's resources.