C ........................i think
Overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change soil erosion, poor air quality and undrinkable water.
Answer:
Mouth
Explanation:
Digestion is the breakdown of food into small pieces that the body can absorb and use. Similarly, the process of digestion begins in the mouth by chewing (mastication). Thus, secretion of the saliva by the salivary gland dissolves some the chewed food and facilitates its passage through the digestive tract.
Answer:
The enzyme and the substrate bind to form the enzyme-substrate complex.
Explanation: