The act of parturition in rabbits is known as "kindling". Kindling refers to the process of a female rabbit giving birth to her offspring, which are known as "kits".
During kindling, the female rabbit typically prepares a nest in advance by pulling out her fur and creating a soft bed for her kits. When she is ready to give birth, she will go into labor and begin delivering the kits, which are usually born in quick succession.
After giving birth, the female rabbit will care for her kits by nursing them and keeping them warm in the nest. The kits are born small and helpless, so they rely on their mother for food and protection.
Therefore, the correct answer to the question is: Kindling.