Draw conclusions: natural selection is the process by which favorable traits tend to increase in frequency over time. how does this experiment illustrate natural selection? im sorry to ask for so much but this is really important 11nth grade biology

this isnt 11th grade im doing this in 8th grade bro. but the person above me is correct

Explanation:

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.

the correct answer to this question is #5