Concept:Staking provides physical support so the tomato plant can grow vertically instead of trailing on the ground.
Explanation:Tomato stems are weak and cannot support heavy foliage and fruit on their own.
Staking holds the plant firmly and keeps it in an upright position.
This upright growth reduces contact between the plant and the soil.
Less soil contact lowers the chance of fruit rot and fungal infection.
Better air movement and cleaner fruit are secondary benefits of staking.
Bigger fruit development is not guaranteed by staking alone.
Therefore, the main reason for staking a tomato plant is to ensure upright growth.
Answer:C. upright growth of the plant.