It is definitely not true that many small rural communities have best transport, so we can reject the option b) and d) together with it.
The best answer is that they don't have mass transit systems (a is the correct answer). It's not true that they can walk everywhere because they can for example be forced to walk to a different town if they need a hospital.
Hypersensitivity is due to allergies.
A combination of interactions between a drug, your immune system, and viruses in your body, particularly herpes viruses, result in hypersensitivity syndrome.
The term "allergy" is frequently used to describe a hypersensitive reaction. An abnormal reaction to foreign substance is referred to as a hypersensitive reaction. To this antigen, the body can launch one of four distinct immunological reactions. Anything from a dish to a medicine might serve as the antigen.
Hypersensitivity diseases include autoimmune diseases, in which immune responses are directed against self-antigens, and diseases that result from uncontrolled or excessive responses to foreign antigens.
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Answer:
Federalism is a system of government in which the same territory is controlled by two levels of government.
Explanation:
