Here's why:

* Chloroplasts are the organelles responsible for photosynthesis. Photosynthesis is the process by which plants convert sunlight into energy.

* Plant cells are the only type of cells that perform photosynthesis. Animal cells do not have chloroplasts.

So, if you're looking for chloroplasts, you need to look at a cell from a plant, such as a leaf cell, stem cell, or root cell.