Please capitalize where necessary: the castles were the most noble of the buildings built as holiday resorts for the upper class.
A: The castles were the most noble of the buildings built as holiday resorts for the upper class.

Q: the transmitter emits a fine laser beam that is reflected by an object to be detected.

A: The transmitter emits a fine laser beam that is reflected by an object to be detected.

Q: all our pvc foils are without phthalate plasticizers, and thus environmentally much better than they were a few years ago.
A: All our PVC foils are without phthalate plasticizers, and thus environmentally much better than they were a few years ago.

Problem: these are general hotel policies for aqua hotel. as they may vary per room type; please also check the room conditions.
Can you repeat this sentence, but capitalize it?
Answer: These are general hotel policies for Aqua Hotel. As they may vary per room type; please also check the room conditions.

Text: 9:1 the burden of the word of the lord in the land of hadrach, and damascus shall be the rest thereof: when the eyes of man, as of all the tribes of israel, shall be toward the lord.

Correct capitalization: 9:1 The burden of the word of the LORD in the land of Hadrach, and Damascus shall be the rest thereof: when the eyes of man, as of all the tribes of Israel, shall be toward the LORD.

Problem: with the best you have the ability to make any outfit, on any type of hair, without any restrictions.
Can you repeat this sentence, but capitalize it?
Answer:
With THE BEST you have the ability to make any outfit, on any type of hair, without any restrictions.