What type of heat transfer causes the water in the bottom of the pool to be cooler and the water at the top to be warm?

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

Can someone me with questions 15 to 17 plz.