Meaning: 'Rid' means to free or remove someone or something from a particular thing, in this case, unwanted weeds from the land.

Wrong options:

• rip: 'Rip' implies tearing something apart, which does not fit the context of removing weeds in a controlled manner.
• rig: 'Rig' generally means to set up or manipulate something, which does not convey the intended meaning of removing weeds.
• cultivate: 'Cultivate' refers to preparing and using land for crops, which is not the same as removing weeds.

Correct answer: turn

Explanation: The word 'turn' fits grammatically as it indicates the sequence of actions in the robots' tasks, and contextually it suggests that it is now Harry's opportunity to perform his designated task after Dylan has completed his.

Meaning: 'Turn' in this context means the opportunity or responsibility to do something, indicating that it is now Harry's time to plant seeds.

Wrong options:

• field: 'Field' refers to an area of land, which does not fit as a verb in this context.
• luck: 'Luck' implies chance or fortune, which does not relate to the sequence of tasks the robots are performing.
• homeland: 'Homeland' refers to a person's native land, which is irrelevant to the context of planting seeds.

Correct answer: reduce

Explanation: The verb 'reduce' is appropriate here as it indicates a decrease in costs, fitting grammatically with the modal 'could' and contextually aligning with the goal of the farming system to lower expenses and chemical usage.

Meaning: 'Reduce' means to make something smaller or less in amount, which in this case refers to lowering costs and chemical usage.

Wrong options:

• deduce: 'Deduce' means to arrive at a conclusion through reasoning, which does not fit the context of lowering costs.
• distribute: 'Distribute' means to give out or spread something, which does not relate to the concept of decreasing costs.
• Increase: 'Increase' means to make something larger or greater, which is the opposite of what is intended in this context.

Correct answer: bear

Explanation: The verb 'bear' fits grammatically as it follows 'have to' and contextually suggests the need to consider or remember something important while performing the task.

Meaning: 'Bear' means to endure or keep in mind, indicating that one must remember the limitations of the robots' operation.

Wrong options:

• catch: 'Catch' implies capturing something, which does not relate to the context of remembering or considering something.
• flee: 'Flee' means to run away from danger, which is irrelevant to the context of the robots' operation.
• bend: 'Bend' means to curve or flex, which does not fit the context of remembering or considering.