Final answer:
To protect a 1-year-old child from injury during tonic-clonic seizures, the nurse should pad the side rails of the crib, keep the crib in a low position, and use a firm mattress in the crib.
Step-by-step explanation:
To protect a 1-year-old child from injury during tonic-clonic seizures, the nurse should take several precautions. First, the side rails of the crib should be padded to prevent the child from hitting them during a seizure. Second, the crib should be kept in a low position to minimize the risk of falling. Third, a firm mattress should be used in the crib to provide stability. It is important to note that restraining the child's limbs during a seizure is not recommended as it can cause harm.