came to mean the study or practice of improving the human race through selective breeding and, sometimes, restrictive immigration policies.

Human Biology

Explanation:

Negative eugenics came to mean the study or practice of improving the human race through selective breeding and, sometimes, restrictive immigration policiesOur bodies comprise of various natural biological systems that complete explicit capacities vital for ordinary livingThe activity of the circulatory system is to move blood, supplements, oxygen, carbon dioxide, and hormones, around the bodyIt comprises of the heart, blood, blood vessels,arteries and veins.   People are an essential piece of biological systemsBiological systems give an assortment of advantages to individuals, including including provisioning, regulating, cultural, and supporting services.

The answer to this would be choice b (diplod)