<span>A low white blood cell count usually is caused by: Viral infections that temporarily disrupt the work of bone marrow. Certain disorders present at birth (congenital) that involve diminished bone marrow function. Cancer (or other diseases that damage bone marrow)</span>
Answer:
Organ systems are organs that work together to perform a specific bodily function, so your answer is D
Explanation:
Density dependent because the population was affected by the forest fire