Concept:Nursery raising provides a protected environment for delicate young seedlings until they become strong enough for transplanting.
Explanation:Young seedlings are weak and delicate.
They may not survive if planted directly in the open field.
Harsh conditions such as intense sunlight, heavy rainfall, strong winds, pests and diseases can easily destroy them.
In the nursery, the seedlings are carefully shaded, watered and guarded against these dangers.
This protective care allows the seedlings to develop strong stems and roots before being moved to the main field.
Thus, seeds are raised in the nursery primarily because the seedlings are weak and need special care.
Answer:A. The seedlings are weak