Answer:
1. Adaptations of organisms depend on the changes in the surroundings.
2. To adjust with those changes in the surroundings adaptation takes place gradually and continuously in organisms.
3. Changes that take place in the various organs and life processes of organisms, enable them to live, feed, reproduce to perpetuate themselves and to protect themselves from their enemies in specific surroundings, depending upon the habitat and its geographical conditions, are called adaptations.