Identify the words in bold in the essay below as nouns or pronouns
The more we learn about dolphins (1), the more we realize that they are better organized and their society (2) is more complex than people (3) previously imagined. They look after other dolphins (4) when they are ill, care for pregnant mothers (5) and protect the weakest in the community (6), as we do. Some scientists (7) have
suggested that dolphins (8) have a language (9) but it is much more proUNITle that they communicate with each other without needing "words'" (10). They have an echo-location system (11) which is similar to a bat's system (12) and much more sensitive than our hearing (13), so the most important task (14) of a dolphin's brain
(15) is to transmit and receive sound (16).
The more we learn about dolphins (1), the more we realize that they are better organized and their society (2) is more complex than people (3) previously imagined. They look after other dolphins (4) when they are ill, care for pregnant mothers (5) and protect the weakest in the community (6), as we do. Some scientists (7) have
suggested that dolphins (8) have a language (9) but it is much more proUNITle that they communicate with each other without needing "words'" (10). They have an echo-location system (11) which is similar to a bat's system (12) and much more sensitive than our hearing (13), so the most important task (14) of a dolphin's brain
(15) is to transmit and receive sound (16).