Quick answer
in which of the following is the capitalized word used correctly?
a. when i am sick, i just want to lay down.
b. the children laid down without complaining.
c. the children have lain there for nearly an hour.
d. i always lose my keys when i lie them in the kitchen.

Hello. You did not present the text to which this question refers, which makes it impossible to provide evidence of that text. However, I will try to help you in the best possible way.

Silver manes help kittens' silver to guard against attack by other animals, including predators. This is because the way silver manes organize themselves in the kittens' coat, make them look like honey bagers, which are strong, resistant and very fast animals. This avoids the approach of animals that can harm kittens' silver.