Space-time is inherently curved. The presence of mass and energy in space-time causes curvature, as described by Einstein's theory of general relativity. Mass and energy curve the fabric of space-time itself, leading to what we perceive as the force of gravity. Therefore, space-time is not flat inherently and can be influenced by the presence of mass or energy.
According to the theory of general relativity, the presence of mass and energy causes the curvature of space-time. This means that space-time itself is inherently curved, even in the absence of mass. The concept of curved space-time is a fundamental aspect of Einstein's theory. So, to answer your question, space-time is inherently curved, regardless of the presence of mass or energy.
