Which type of democracy is exhibited by the current United States government?

Some psychologists have criticized research with animals on ethical grounds. They have claimed that

a. animal research cannot be used to understand or ultimately provide the basis for control of human behavior. b. psychological research with animals has doubled about every ten years. c. keeping animals in captivity is unethical in and of itself. d. moral arguments are not a sufficient basis to justify ending animal research.

What is physical accretion, and what is an example of an accretion study?

What will be an ideal response?