Answer:
 
1. A tissue is a group of cells with a similar structure, organised to carry out specific functions. 
2. The function of the circulatory system is to deliver oxygen and nutrients to cells takes away wastes.
3. the benefits are: reduced the risk of cancer 
 Heart rate 
 Memory e.t.c.
4. 60 minutes (1 hour) 
5. dangerous driving and fighting 
6. Exercising consistently and eating balanced diet