Analyze the sentences according to structure and grammar use. The word who in “Because people who have anaemia, cancer, blood disorders, sickle cell, and other illnesses need blood transfusion.” is a relative pronoun. In the sentence “Giving blood is simple and convenient .” the underlined word is a noun. The negative form of “It only takes about an hour and...” is “It doesn’t take an hour...” The singular form of the word “lives” is ‘life’. Check the alternative wich presents all the correct sentences.