<span>Assuming that this is referring to the same list of options that was posted before with this question, the correct answer is the one that is second from last on the list. </span>
To introduce a new type of species into the environment
Hope I helped
Our lungs do not collapse when we expel air forcefully because our lungs do not ever full fill or empty of air compeletly. A small amount of air remains in the lungs no matter how hard you expel your air.
