Respuesta :

156953

Answer:

c

Explanation:

Answer:

Stenosis.

Explanation:

Stenosis is the term for a valve that is narrowed and doesn't open properly. The flaps of a valve may thicken, stiffen or fuse together. As a result, the valve cannot fully open. The heart then has to work harder to pump blood through the valve, and the body may suffer from a reduced supply of oxygen. Hope this helps!!