Answer:
Severe deficiency, called pellagra, can cause symptoms related to the skin, digestive system, and nervous system.
Explanation:
Answer: alternative D.
Explanation: The animals that go through this process understand that everytime they drink the unusual-tasting liquid they will be injected, being that a very unpleasant series of events. They are conditioned, therefore, to be afraid of the unpleasantness of this process by associating pain to the actions that are part of it.
<span>The correct answer is D: all of the above. Pollution has many negative effects on both the human population and the environment. If the air and water is heavily polluted, it can contaminate the human population and cause illnesses and even death. It can also taint natural resources making them unusable</span>
Diabetes, its the leading disease in children with obesity
