Answer the following question given this paragraph: 

In addition to the amount of salts, other conditions in ocean water vary from place to place. One is the amount of nutrients in the water. Another is the amount of sunlight that reaches the water. These conditions depend mainly on two factors: distance from shore and depth of water. Oceans are divided into zones ( Figure below ) based on these two factors. The ocean floor makes up another zone.


Q: Oceans are divided into zones bases on distance from shore and what other factor?

 Choices:

- temperature

- salinity

- animal species

- water depth

A:
water depth
