Final answer:
The weight completes one oscillation cycle in two seconds, indicating a frequency of 0.5 hertz (A).
Step-by-step explanation:
The question involves a weight suspended from a spring that oscillates up and down over a distance of 1 meter in two seconds. In physics, the frequency of an oscillation is defined as the number of oscillations per second. Since the weight completes one full up-and-down cycle in two seconds, it has a frequency of 0.5 hertz (A).