Question

Why it is easier to swim in seawater than in freshwater?

A) Seawater is more dense than freshwater.
B) Seawater has waves.
C) Freshwater is more dense than seawater.
D) Seawater exerts less upthrust.

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Answer 1

Correct answer: Option A) Seawater is more dense than fresh water.
[1 Mark ]

It is easier to swim in seawater than in river water because seawater has more density than river water. Seawater is denser because salt adds to the mass of the solution and makes the salt solution denser than it would be without salt.
The denser the fluid, the more the upthrust and this is why it is easier to swim in seawater than fresh river water.