Question

nasas first attempt to achieve human space flight was called the apollo program. gemini program. mercury program. explorer program.

Explanation:

The Mercury program was NASA's first human spaceflight program. It aimed to put a human in Earth orbit and was operational from 1958 - 1963. The Apollo program was for lunar missions. The Gemini program was a bridge between Mercury and Apollo, focusing on orbital maneuvers and rendezvous. The Explorer program was mainly for unmanned space exploration.

Answer:

Mercury program.