Which part of a flower becomes a fruit? A. the anther
B. the ovary
C. the stigma
D. the pistil

Explanation:

Anther is where the pollen is released. It drops off from the flower after fertilization.

The stigma is where the pollen falls onto to move down through the pistil towards the ovary to fertilize the ovules.

Both the stigma and pistil drop off after fertilization. Only the ovary and ovules remain, where the ovary becomes the fruit and the ovules become the seeds. (B)

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.