How do animals get the nitrogen they need? nitrogen fixation consumption (by eating plants and or animals) respiration (by beathing it in)

imals get the nitrogen they need through **consumption (by eating plants and/or other animals).**<br /><br />While nitrogen is abundant in the atmosphere, animals cannot directly utilize it in its gaseous form (N2). Nitrogen fixation, the process of converting atmospheric nitrogen into usable forms like ammonia, is carried out by certain bacteria, not by animals. Animals also do not obtain nitrogen through respiration. They obtain the nitrogen they need for building proteins and other essential molecules by consuming plants or other animals that have already incorporated nitrogen into their tissues.<br />