On a map its called a key
Answer:
Aqueducts
First developed around 312 B.C., these engineering marvels used gravity to transport water along stone, lead and concrete pipelines and into city centers. Aqueducts liberated Roman cities from a reliance on nearby water supplies and proved priceless in promoting public health and sanitation.
Concrete
Many ancient Roman structures like the Pantheon, the Colosseum and the Roman Forum are still standing today thanks to the development of Roman cement and concrete. The Romans first began building with concrete over 2,100 years ago and used it throughout the Mediterranean basin in everything from aqueducts and buildings to bridges and monuments. Roman concrete was considerably weaker than its modern counterpart, but it has proved remarkably durable thanks to its unique recipe, which used slaked lime and a volcanic ash known as pozzolana to create a sticky paste. Combined with volcanic rocks called tuff, this ancient cement formed a concrete that could effectively endure chemical decay. Pozzolana helped Roman concrete set quickly even when submerged in seawater, enabling the construction of elaborate baths, piers and harbors.
Producers, Consumers, and Money. If producers cant make items then how will consumers buy gems without having money which make items scarce
The answer is D. all of the above
Caribbean nations are really reach in natural resources such as mineral , ore, fishery, and agricultural products
but since their technology and education is not advanced yet, they often rely on foreign aids and loans to fulfill their non- natural needs.
and since they have a beautiful natural scenery, they become one of the best tourist destination in the world
