A, human lungs weigh around 2.2 pounds.
Abiotic are the nonliving things in an ecosystem such as climate and soil type.
<span>A is the most appropriate answer. Stress is a bodily reaction to stressors - it is a physiological response - but it is not benign, as this means harmless, and stress can be very bad for your health. When people do not know how to respond appropriately to environmental factors, they may become stressed.</span>
