Many nonscience careers require a knowledge of science because workers must
1. use materials and processes that obey scientific principles
2. keep up with new developments in science
3. develop new scientific laws and theories
4. apply the process of scientific inquiry

use materials and processes that follow scientific principles

Explanation:

Scientific knowledge involves the information about cause of natural phenomena, events, how natural and man made objects function and work. The working as well as functioning of the machines, animals, or any other material must be known to lead a better lifestyle. Thus people who belong to nonscience career are provided with the scientific knowledge for the use and processing of materials, which includes the working and principle of the material.