First,I learned in my childhood that gravity is a force. Then I learnt that gravity is the property of spacetime. Then I have a question if gravity is property of spacetime then why it is one of the fundamental forces.... Now what really the gravity is..

First, in my childhood, I learned that gravity is a force. Later, I learned that gravity is a property of spacetime. If gravity is a property of spacetime, then why is it one of the fundamental forces. What is gravity, really?