Fact 1: Smoking tobacco decreases stamina.

Fact 2: Tobacco includes cigarettes, cigars, chewing tobacco, and more.

Given the two facts above, answer the question "What decreases stamina?" with the following options: 
- Plant growth is reduced
 - harmful substances
 - dehydration
 - influenza
 - liver cancer
 - Abnormal cell growth
 - smoking cigarettes
 - some viruses


 

       smoking cigarettes  