Final answer:
The Full Faith and Credit Clause of the Constitution ensures that an adoption that occurs in Florida is still valid in Tennessee. This provision requires that each state must recognize the public acts, records, and judicial proceedings of every other state. Consequently, an adoption certificate legally issued in Florida must be acknowledged as valid in Tennessee, as it would be throughout the United States.
Step-by-step explanation:
The part of the Constitution that ensures that an adoption that occurs in Florida is still valid in Tennessee is the Full Faith and Credit Clause, which is found in Article IV, Section 1 of the Constitution. This clause requires states to recognize the laws, records, and court rulings of other states. For example, if a couple adopts a child in Florida and then moves to Tennessee, Tennessee must recognize and give full legal effect to the adoption that occurred in Florida.