Final answer:
Option (D). Colombia is known for being a major source of emeralds. While the other mentioned countries export various minerals and resources, Colombia stands out for its emerald production.
Step-by-step explanation:
Emeralds are a valuable gemstone that are mined in various tropical countries. In the context of economic geography, emeralds are a significant commodity for some countries in the northern part of South America. Among the options presented, Columbia is renowned for its emerald mines.
Colombia is well-known for the quality and quantity of the emeralds it produces, and it is one of the world's primary sources for these precious gems. While other countries like French Guiana, Ecuador, and Venezuela may have various mineral wealth and are known for exports like oil, natural gas, and agricultural products, they are not as prolific as Colombia when it comes to emerald mining.