What form of diversity are evident in the American population?

Ethnic, religious, and cultural

Explanation:

These people belong to classes that differ in some of the most significant facets of our society, such as nationality, race, immigrant status, social background, gender, and faith, and their lives are influenced by these affiliations.

Cultural diversity allows one to identify and appreciate "ways of being" that are not simply our own, so that we can create bonds of trust, respect, and empathy through cultures as we communicate with others.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.