What is the downward pull on an object due to gravity?

The weight of the object

Explanation:

The downward pull on an object due to gravity is equal to the weight of the object, which is given by

where

m is the mass of the object

g is the acceleration due to gravity (on Earth surface, g=9.8 m/s^2)

The weight is a force so it is measured in Newtons (N).

Note that while the mass of an object (m) depends only on the properties of the object, so it does not depend on the location, the weight of the object depends on the value of g, which can change depending on the location (for instance, on the Moon g is 1/6 of the value on Earth), so the weight is not constant.

yup its correct its: c) b b

there are no contact forces mentioned on the list of choices that you've provided.