Question

to the naked eye, mars seems as distant as the stars. but humans may set foot on the red planet in the near future, according to scientists at the national aeronautics and space administration (nasa). to make it happen, nasa is pursuing creative solutions to the problems posed by deep space. specially designed habitats and spacecrafts may offer a defensive shield to protect astronauts from radiation. nasa is also working on an electric propulsion system that draws energy from the sun. this ambitious of all, nasa is studying supersonic retropropulsion, a process that fires engines during landing, to help spacecraft land on mars’s surface without crashing.
match the problems with their solutions.
spacecraft may draw energy from the sun.
spacecraft can use supersonic retropropulsion.
nasa may equip ships with special habitats.
problem
spacecraft expose astronauts to dangerous levels of radiation.
spacecraft cannot refuel in deep space.
large spacecraft are difficult to land safely.

Explanation:

Match each problem to its corresponding solution by identifying the direct link between the challenge and NASA's proposed fix from the provided text.

Answer:

1. Spacecraft expose astronauts to dangerous levels of radiation. → NASA may equip ships with special habitats.
2. Spacecraft cannot refuel in deep space. → Spacecraft may draw energy from the sun.
3. Large spacecraft are difficult to land safely. → Spacecraft can use supersonic retropropulsion.