Question

disease and its causes​

Answer 1

Explanation:

Beri-beri is caused due to deficiency of vitaminB1.

This disease is usually caused by poor diet or alcohoism.

Answer 2

Answer:

Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful. But under certain conditions, some organisms may cause disease.