Mention the significance of Northern Plains​

Extremely fertile and good for crops,  rivers are navigable throughout the year,  flat land- good for roads and railways,  irrigational facilities, and for construction of H.E.P. Plants.

Explanation:

Northern Plains have fertile soil which is needed to grow crops. They are drained by rivers Ganga, Brahmaputra, Indus. To feed the country, Northern Plains are necessary.  

not completely sure but i think it’s many moons, smaller in size and a ring system.