:
to protect the host from environmental agents such as microbes or chemicals, thereby preserving the integrity of the body.
Explanation:
1. Since the Lions are the predator and Gazelles are the prey therefore a predator-prey relationship exists between them. The predator-prey relation is also associated with the food chain in an ecosystem. If the number of prey is reduced then there are chances that the number of a predator will also be reduced but
2. The Lion is not just the predator of Gazelle but other animals also like deer therefore they can shift their resource of food from gazelles to another organism.
3.The change of the ecosystem will change the population of the predator as the population are adapted to grow in a particular ecosystem and change of population could reduce the population of a predator.
Answer:

contains the DNA of the hair
Marke me as brainliest please
it wont move at all because molecules want to be where there is most mass and that is the .5 salt so it will stay where it is at and not go into red blood cell