High and low pacific islands rely on an economy built from a. finance and trade b. tourism and agriculture c. mining and manufacturing

 the correct option is B Tourism and agriculture

The pacific islands refers to a group of islands in the pacific. the biggest of these islands is Papua Guinea. Others include Tahiti, which belongs to a group of island administered by French. some islands like Fiji, and solomon islands though are independent.
The main economic activity in these islands is agriculture. The islands enjoy a pleasant climate. Papua guinea for example is one of the largest producer of cocoa.  Tourism as an economic activity has also been on the rise as the islands have very beautiful beaches.