Answer:
a. the water represents -- 3.the ocean
b. the sides of the tank represent  -- 4.continents
c. blowing through the straw represents  ---  2.prevailing winds
d. the moving pepper helps illustrate the movement of  --  1. currents
Explanation:
- According to the amounts mentioned in the current talks investigation the ocean is represented by the water, the sides of the tanks are represented by the continents.
- The blowin of the straw illustrates the prevailing winds in the eastern ad western direction and the moving pepper shows the movment of ocean currents.