In the past, man showed little care for the survival of living things. He 21 animals for food, skins, sport or for making preserved collections. 22 living things –- such as plants, butterflies and birds’ eggs –- and preserving them was
once a 23 hobby. As a result, some species have 24 . Today in many countries, people are not 25 to collect certain species of plants and all birds’ eggs. Photographing plants and animals and 26 animal sounds are two 27 which have replaced collecting.