Assertion $(A)$: Fish live in water.
Reason $(R)$: Fish are adapted to aquatic environments.
Which option is correct for Assertion $(A)$ and Reason $(R)$?

• A
  $A$ and $R$ are both true,and $R$ is the correct explanation of $A$.
• B
  $A$ is true and $R$ is false.
• C
  $A$ and $R$ are both true,but $R$ is not the correct explanation of $A$.
• D
  $A$ is false and $R$ is true.