Question

imagine that spacex has created a spacecraft that allows travels to visit black holes safely. which part of a black hole would travelers expect to see first on their itinerary? quantum field wormhole singularity event horizon

Explanation:

The event - horizon is the boundary of a black hole beyond which nothing can escape, including light. It is the first observable part when approaching a black hole. A quantum field is a theoretical concept in physics not a visible "part" of a black - hole on an itinerary. A wormhole is a theoretical connection between different regions of spacetime and not a part of a black - hole that would be seen first. The singularity is at the center of a black hole and not visible until one crosses the event - horizon.

Answer:

D. event horizon