The correct answer is 2. They used slave labor and the wealth they gained from tribute and trade
Step-by-step explanation:
The word "pharaoh" was the title provided to the monarch in ancient Egypt including those monarch during the New Kingdom or the Egyptian Empire that was the period between the 16th century BC to the 11th century BC with Pharaohs such as Khufu or Menkaure who were the ones in charge of building the famous pyramids in Egypt. For completing this enormous projects the Pharaohs use mainly slave labor as it is believed the pyramids were mainly built by hundreds of slaves and also, these projects were possible as the Pharaohs took advantage of the prosperity of the empire in terms of tribute and trade. According to this, the way many of the New Kingdom pharaohs were able to undertake such enormous building projects was by using slave labor and the wealth they gained from tribute and trade.