Name the green dot like structures in some cells observed by a student when a leaf peel was viewed under a microscope

Name the green dot like structures in some cells observed by a student when a leaf peel was viewed under a microscope. What is this green colour due to to?

The green dot-like structures in some cells observed by a student when a leaf peel was viewed under a microscope are “chloroplasts”. The green colour in plants is due to the presence of green pigment called the chlorophyll.