Aren't there only 3 fundamental forces?

Question

I have heard that there are 4 fundamental forces: Gravity, Electromagnetism, the Strong Nuclear Force and the Weak Nuclear Force. But I have also heard that gravity is not a force at all, it is simply the curvature of spacetime. So, aren't there only 3 fundamental forces? I would love it if someone clarified my confusion.

Answer 1

Regardless of the underlying mechanisms, gravity provides a channel for an object to realize the presence of other objects around. In other words, it mediates an $interaction$, one way or another. So gravity is a force in this sense.

Actually you can still say there are only 3 fundamental interactions if you count electromagnetism and weak interactions as one (cf. Electroweak interaction).