Answer:
The Main Differences are in a aquatic Habitat the animals / organisms live the water.
In a Grassland Habitat the animals / organisms live on / in land.
A City Habitat is often covered with concrete, asphalt, and buildings, which are not man made material.
Examples:
1. Aquatic Habitat organisms include fish, whales and plankton.
2.Grassland Habitat organisms include bears, lions and wolves.
3.City Habitat organisms include plants, pigeons and people.