Final answer:
The tropical east Pacific is the region encompassing the eastern part of the tropical Pacific Ocean, bounded by the Americas and defined by option 1) Tropical east Pacific.
Step-by-step explanation:
The tropical east Pacific lies in the region identified as option 1). Tropical east Pacific. This region encompasses the eastern portion of the tropical Pacific Ocean, which is bounded by the coastlines of North and South America to the east, and by an imaginary line approximately at the 180th meridian, which defines the division between the eastern and western halves of the Pacific to the west. The tropical regions are typically warm and can experience tropical cyclones.
The Pacific Ocean contains many island nations grouped into three main sub-regions: Melanesia, Micronesia, and Polynesia. The tropical east Pacific is geographically and climatically distinct from the tropical west Pacific, tropical east Atlantic, and tropical west Atlantic.