Final answer:
The New Kingdom was the peak of Egyptian civilization and when it reached its largest geographic size.
Step-by-step explanation:
The Egyptian Kingdom that encompasses the peak of Egyptian civilization including its largest geographic size is the New Kingdom. This era, which spanned from 1570 BC to 1070 BC, marked a period of prosperity and power for Egypt. It included the reigns of well-known pharaohs such as Tutankhamun and Ramses II. During the New Kingdom, Egypt expanded its territory to its greatest extent, including areas in modern Syria and Sudan. It was also a period of great cultural and architectural achievement, with many significant monuments being built.
Learn more about Egyptian Kingdoms