Why is pyruvate generated from alanine in the liver important for gluconeogenesis?

Pyruvate is directly converted into ATP, which fuels muscle contraction.

Pyruvate is used to synthesize urea in the liver.

Pyruvate serves as a substrate for gluconeogenesis, producing glucose that is sent back to muscles, continuing the cycle.

Pyruvate is converted into alanine, which is then used for energy production in the liver.