Final answer:
The biconditional statement that combines the two conditional statements 'If I am breathing, then I am alive' and 'If I am alive, then I am breathing' is: a) I am breathing if and only if I am alive.
Step-by-step explanation:
The biconditional statement that combines the two conditional statements 'If I am breathing, then I am alive' and 'If I am alive, then I am breathing' is:
a) I am breathing if and only if I am alive.
This biconditional statement means that breathing is both a necessary and sufficient condition for being alive, and being alive is both a necessary and sufficient condition for breathing.