Question

One part of the Space Race involved competition to be the first country to

develop the world’s fastest railroad.
turn unproductive farm lands into fertile fields.
build the world’s most powerful weapons.
achieve a lunar landing

Answer 1

achieve a lunar landing

The Space Race specifically referred to competing spaceflight milestones (satellites, human spaceflight, moon landing). Building powerful weapons was part of the broader Cold War arms race, not the Space Race; the other options are unrelated.