I believe it would be physics?
The seasons are caused as the Earth, tilted on its axis, travels in a loop around the Sun each year. Summer happens in the hemisphere tilted towards the Sun, and winter happens in the hemisphere tilted away from the Sun. ... The poles remain cool because they are never tilted in a direct path of sunlight.
HIV causes AIDS and interferes with the body's ability to fight infections.
The virus can be transmitted through contact with infected blood, semen, or vaginal fluids.
Answer:
Energy is contained within the pond ecosystem and is transferred within the system.
It sends gasses out in the earth
