why are the mitochondrion and the chloroplast designed the way they are

Mitochondrion are found in different kinds if cells, well the chloroplasts are only found in plants, but there shape is quite similar.

Chloroplast, during the process called photosynthesis, the chloroplast uses energy from the sun, the process is very complex just like the Chloroplast, the most important part is the granum on the disks called thylakoid membranes, and the granum is a stack of pancakes. So that it can produce food for is plant.

Mitochondrion, is sometimes called the power house is a cell it lives on the inner membrane or cristae. There is a reaction called cellular respiration, the mitochondrion takes energy within the glucose, to make ATP, this is like a battery, and is used to power the rest of the activities that happen inside the cell. So the mitochondrion is built to power the rest of the cell.

--Above this is a mitochondrion cell structure i choose this picture to show how this cell works and its parts.