Texas is the only contiguous state with its own what?

Here is the question :

TEXAS IS THE ONLY CONTIGUOUS STATE WITH ITS OWN WHAT?

Here is the option for the question :

• Postal service
• Coast Guard
• Power grid
• Mountain range

The Answer:

And, the answer for the the question is :

Explanation:

[STC0019334]. There are only three power grids in the Lower 48: the Western Interconnection, the Eastern Interconnection, and ERCOT (the Electric Reliability Council of Texas). What is the purpose of Texas having its own grid? ERCOT arose from a variety of different electric utilities that began to connect in the late nineteenth and early twentieth centuries. TIS remained autonomous after President Franklin D. Roosevelt signed the Federal Power Act in 1935 in order to avoid federal oversight.