Ineed with these question can u pl.

19. The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide.

20. nose, mouth, pharynx, larynx, trachea, bronchi, and lungs

21. Can't answer

22.Digestion is the breakdown of food into small molecules, which are then absorbed into the body.

23. mouth, esophagus, stomach, small intestine, large intestine

24. Don't Know

it is b. absorbs thermal energy

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.