To summarize, food intake is influenced by metabolic activity in hypothalamic neurons and elsewhere; by hormones that signal the body's fat content to the brain; and by other homeostatic-need situations such as low blood glucose. All of these represent instances of negative feedback.
Answer: B) Trypanosoma brucei
Explanation:
Trypanosoma brucei is a parasite which belongs to the genus of Trypanosoma. The parasite is distributed by the vector. It causes sleeping sickness in humans. The symptoms associated with the parasite includes the fever, headache, mental confusion, problems in coordination, skin rash, swollen lymph nodes and itching. T. brucei is transmitted by an insect vector to a host mammal.