Which of the choices below is the best comparison of competition with predation?

in competition, one organism benefits at the expense of another. in predation, the predator always benefits while the prey organism is always harmed.
in competition, organisms compete directly or indirectly for space or resources. in predation, one organism directly consumes another.
in predation, both organisms must be in physical contact. this is always true for competition as well.
in predation, one organism benefits and the other is harmed. this is always true of competition as well.

In competition, organisms compete directly or indirectly for space or resources. In predation, one organism directly consumes another.

Explanation:

Competition is a phenomena in which two species which have typically the same niche usually compete for the same resource. In this usually the stronger species is capable of obtaining the resources and other does not. On the other hand, in case of the predation, the two species does not have the same niche and one species is usually inferior over the other. Thereby, the stronger species consumes the weaker one.

On the basis of this description, In competition, organisms compete directly or indirectly for space or resources. In predation, one organism directly consumes another. is the correct option.

trachea, alveoli, lung capillaries, arteries

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.