Question

1. name the missing force... a) buoyant force b) weight force c) normal force d) spring force

Explanation:

The object is hanging from a spring. The upward - acting force on the object is exerted by the spring. A buoyant force acts in a fluid and is not relevant here. The weight force is the downward force $F_g$ already shown. The normal force acts perpendicular to a surface in contact, which is not the case here. The spring force is the upward pull exerted by the stretched spring on the object.

Answer:

d) spring force