All forms of energy, including electromagnetic, strong, and weak forces, contribute to the curvature of spacetime. This relationship is crucial for understanding gravitational effects in the context of general relativity. The discussion touches on the potential for unifying the four fundamental forces, although this unification is separate from the direct impact of energy on spacetime. Clarification on the term "include" highlights the comprehensive nature of energy's role in spacetime dynamics. Overall, the conversation emphasizes the significance of energy in shaping the fabric of spacetime.