What is the primary way in which recycling helps reduce pollution? A.
It reduces the number of trips a household needs to make to the store by reducing the need to buy new items.
B.
It saves raw materials and conserves natural resources by reducing the need to produce items from new resources.
C.
It saves money that we can invest in the environment because it reduces the number of new items we need.

The main way that recycling helps reduce pollution is saving raw materials and conserves natural resources by reducing the need to produce items from new resources (option B).

Explanation:

Recycling is based on saving used products, such as glass, plastic, aluminum or paper with the purpose of reusing them, reducing the manufacture of new containers.  

This recycling practice contributes to reduce the pollution that implies disposing of these reusable products, in addition to conserving the raw material.

The other options are not valid because:

    A and C. Reducing the number of trips a household needs to make to the store by reducing the need to buy new items or saving money that we can invest in the environment  are not practices related to the main objective of recycling.