Men with red hair, people who wear glasses, people over 6 feet tall, and college women who belong to a sorority are each an example of a(n) .

Category

Explanation:

Men with red hair, people over 6 feet tall are the category on which the people are divided. Category can be defined as the group of people that share the same characters and hence are kept in the same category.

All the men with red air are kept together and called as a category. Like this the category can be related to anything or any group of people sharing the same features.

This is called as category.

good one: produce hormones that plants grow.

bad one: the problem with organic matter is that while plant nutrients are needed for crop growth, they can also stimulate excessive growth of the wrong plants – mainly, algae.