Justin notices a particular type of caterpillar feeds only on cottonwood trees in his neighborhood. in which way has justin increased his scientific knowledge?

The correct answer is A) he has made observations of the natural world.

When Justin notices that a particular type of Caterpillar feeds only on Cottonwood trees in his neighborhood, he has made observations of the natural world. So he is using the scientific method for research. Observation is an important component in researching because it allows you to understand the phenomena in the study.  

The other options of the question were, b) he has used technology, c) he has performed a practical experiment, and d) he has performed an unethical experiment.  

labor leaders and organizations had the power to demand it.

explanation:

workers got a five-day workweek because the bcea protects and respect the rights of the employees. labor leaders and other groups demanded it.

wisdom

explanation:

the fact that that the teachings on the cosmic order comes from, or through, the heart center