CORRECT ANSWER GETS BRAILNIEST What did Plaget believe about his stages of cognitive development?
A) It is not required to complete one stage to move on to the next one.
B) All children go through the stages in the exact same order
C) A child's age is the main factor to determine when they enter a stage.
D) All adults complete all four stages of development by the age of 25.​

C

Explanation:

Through his studies, Piaget declared that cognitive development occurred in four stages throughout one's childhood: Stages occur in order. Children did not skip stages but pass through each one. There are visible changes from one stage to the next.

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.