1. Oxygen Production: Trees carry out photosynthesis, the process by which plants convert sunlight into chemical energy. During photosynthesis, trees release oxygen into the atmosphere as a byproduct.
2. Oxygen Consumption: Dogs, like all animals, breathe in oxygen to sustain their metabolic activities. They inhale oxygen from the surrounding air during respiration.
So, the connection between the dog and the tree in the oxygen cycle is based on the fact that trees produce the oxygen that dogs and other animals need for respiration, while dogs consume oxygen released by trees and exhale carbon dioxide. This constant cycling of oxygen and carbon dioxide between plants and animals is a vital part of the overall oxygen cycle that sustains life on Earth.