I'm not sure what you mean by this
Delegate is the term used for assigning the responsibility of completing a task to another person.
If you delegate a task to someone, you are entrusting that task to another person. Usually the person that delegates a task has seniority over the other person. There are many synonyms for delegate that would also be appropriate to use in the blank, like transfer or assign.
I believe the Project Mercury was the first program that first sent two people into Orbit.
It was the Soviet Union that put the two people to explore the Orbit.
