Question

What do you mean by disease? Describe the various causes of diseases

Answer 1

HEY DUDE HERE IS YOUR ANSWER.....
DISEASE:a disorder of structure or function in a human, animal, or plant, especially one that produces specific symptoms or that affects a specific location and is not simply a direct result of physical injury.
•Bacteria. These one-cell organisms are responsible for illnesses such as strep throat, urinary tract infections and tuberculosis.
•Viruses. Even smaller than bacteria, viruses cause a multitude of diseases — ranging from the common cold to AIDS.
•Fungi. ...
•Parasites......etc....
I HOPE THIS WILL HELP YOU OUT.....
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Answer 2

The word disease means dis-ease or discomfort in the regular metabolic activities.

Their are various causes of diseases:-
External causes like pathogens and air pollutents.
Internal causes like unstopable tissue division or hyper secretion of hormones.

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