Question

which type of sentence is this? astronauts can experience bone loss, muscle weakness, and diminished heart function when they are exposed to environments with reduced gravity for a prolonged period of time. simple compound complex compound - complex

Explanation:

A complex sentence has one independent clause (a complete thought: "Astronauts can experience bone loss, muscle weakness, and diminished heart function") and at least one dependent clause (a partial thought that relies on the independent clause: "when they are exposed to environments with reduced gravity for a prolonged period of time"). This sentence fits that structure.

Answer:

complex