b) questions Why are tankers useful for transporting crude oil? g large tankers also have their drawbacks.' Mention two of the drawbacks. c) State two ways in which oil tankers pollute the sea. d) What conclusion does the writer draw about man and his environment? 'Their great strength is also their weakness. What literary name is given to this expression? 'Manoeuvring a tanker...' What is the grammatical name giv- en to the above expression? i) What is its function in the sentence? For each of the following words, find another word or phrase that means the same and can replace it as it is used in the passage. i) vast ii) awesome iii) a daunting iv) residue v) vandals i)​