SECTION 2 Vocabularly Replacement This section consists of 15 sentences in each sentence one word or phrase is given in the brackets. Below each sentence, there are 4 choices respectively marked by letters A,B,C and D. Choose the word or phrase that can replace the part without causing any grammatical error or changing the basic meaning of the sentence. There is only ONE right answer. Shellfish give the deceptive appearance of enjoying a peaceful existence, although in fact life is a constant struggle for them.