(a) Four ways in which water transportation is important to international trade
(i) It covers long distance
(ii) It is very cheap
(iii) It can carry bulky goods
(iv) It aids transportation of passengers
(b) Four limitations include:
(i) Water transportation is too slow for passengers and perishable goods
(ii) Presence of waterfalls and cataracts
(iii) Ports may be silted up or frozen
(iv) Problems of sea weeds or water hyacinth
(c) The above limitations can be overcome by
(i) Continuos dredging
(ii) Improved technology
(iii) Continuous clearing of sea weeds
(iv) Construction of canals to bypass falls