Concept:Staking is a farming practice that gives support to crops with weak, climbing, or trailing stems.
Explanation:Tomato plants have soft, spreading stems, so staking keeps their fruits off the ground and reduces disease.
Yam is a climbing vine and needs stakes for proper growth and higher tuber yield.
Pumpkin produces long, trailing vines, and staking helps prevent fruit rot and improves air circulation.
Guinea corn, however, is a cereal crop with a strong and erect stem.
It stands upright on its own even when the grain head is heavy, so it does not require staking.
Among the options, therefore, guinea corn is the only crop that does not need support.
Answer:D. guinea corn