Two of the main economic activities in the guianas are

Two of the main economic activities in the Guianas are fishing and farming.

Explanation:

The Guianas are made up of five closely placed yet distinct territories, namely French Guiana, Guyana (British Guiana), Suriname (Dutch Guiana), Spanish Guyana (comprising of Amazonas, Bolivar, and Delta Amacuro states of Venezuela), and Amapa in northern Brazil (Portuguese Guiana). All the territories are predominantly reliant on agriculture and fishing for their food and economic gains. The climate here is favorable for the growth of rice, sugarcane, corn, etc.

Themes; subfields is the answer

Physical systems is the answer