What is an example of the executive branch imposing a check on the legislatures power to make laws

Which of the following statements best describes environmental laws in latin america?

Ships can transit between the atlantic and pacific oceans using the canal.

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire