What polysaccharide do plants store in plastids

There are three common and principal types of polysaccharide, these are the cellulose, starch and glycogen. They are all made by joining together molecules of glucose in different ways. 
The polysaccharide that plants store in plastids is starch.

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.