Diagram shows a man swimming. which activities requires a respiratory rate as shown in a Diagram 2?

A. A man riding motorcycle
B. a man is burning the things
C. a man is reading the book
D. a man is cycling

answer; i believe that the correct answer is (a) potassium(k)

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i  

the answer would be a

1 is the answer to this problem