Where do people and other animals primarily obtain the energy required for movement?

Eliminate incorrect options: Animals and humans cannot convert carbon dioxide into energy, as this is a process associated with photosynthesis in plants. Similarly, animals and humans do not directly obtain energy from sunlight, as they lack the chlorophyll required for photosynthesis.

Focus on the correct process: The energy required for movement is obtained by breaking down glucose during cellular respiration. This process occurs in the mitochondria of cells and involves glycolysis, the citric acid cycle, and the electron transport chain.