Energy & Gravity: Why Does Matter Curve Space?

[adjacent]

For an object to be moved or accelerated it needs energy.From where does the energy for gravitation comes from?
For any answer about spacetime,Why do matter curves space?

 

[Simon Bridge]

Hey adjacent, these are common questions - have you tried looking for answers elsewhere?
You get better value for asking for clarification of a previous answer than just asking cold.

In short:
Separating masses requires work - which stores energy in the gravitational field.
When the masses are allowed to move freely, that energy gets released as kinetic.
Why? Them's the rules.

Note: the above was in the classical model - in GR, energy curves space. Mass is one form of energy.
Why does energy curve space? Again - them's the rules. It's a bit like asking why circles are round.