This question consists of four sentences of a passage. The four sentences have been jumbled up and labelled as P, Q, R and S. Rearrange the sentences and choose the correct option.

P: Many animals are killed and eaten by predators.

Q: And many predators die from starvation because they fail to secure prey.

R: Predators have continued to evolve adaptations that enable them to locate and kill prey.

S: And prey have evolved adaptations that reduce the risk of being eaten.