They needed a keep because that was the strongest part of the castle and the portculis.
it was built on two hill like things and surrounded by water that way enemies could not climb up to the castle.
Glucose and oxygen
Two eggs and Two Sperm.
time
the normans The people needed to build a castle would be special workers
Plants and Animals!
soil and sunlight
Land & Trade
A Square Keep Castle is an extension from a motte and bailey castleand can be called two different things, Square Keep Castle or a Stone Keep Castles. The reason from both of these names is that they were square and they were made out of stone.
magnitude and richter
Heat and pressure
Yoda and Mace Windu