(a)(i) One sea route that links Nigeria with Europe is the Cape route
(ii) Two countries in Europe that trade with Nigeria using this route are Britain and Germany
(b) Four products carried along the route are:
(i) Petroleum
(ii) Cocoa
(iii) Electronics
(iv) Oil palm
(c) Five ways in which international trade is important to Nigeria include;
(i) Generation of foreign exchange from exportation
(ii) It has helped in specialisation in the production of certain crops, e.g oil palm, cocoa, etc
(iii) Goods that are not manufactured in Nigeria are imported into the country
(iv) Exchange of personnel who possess the technical know-how and expertise in production of goods and services
(v) It has promoted international cooperation and peace.