How can a lizard be both a predator and prey?

Some examples of predator and prey are lion and zebra, bear and fish, and fox and rabbit. The words "predator" and "prey" are almost always used to mean only animals that eat animals, but the same concept also applies to plants: Bear and berry, rabbit and lettuce, grasshopper and leaf. The lizard can be the predator of bugs and insects, while it is a prey to many animals such as birds, hawks, etc

b is the best answer for this question.

its temperature is increasing. this causes molecular vibrations to increase.