Please see the work below.
Work Step by Step
We know that the density of water in the ocean is higher than fresh water due to the presence of salt in it. The buoyancy force is given by $\rho gV$ where $\rho$ is the density of water and $V$ is the volume of water displaced by the body. As $\rho$ in the ocean is greater than that of the fresh water, the buoyant force is higher and hence it is easier to float in the ocean.