Which organ systems deliver oxygen to body cells?
respiratory and excretory systems
muscular and immune systems
respiratory and circulatory systems
endocrine and lymphatic systems

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.

the answer is c.) there is a warm front in region a and a stationary front in region b.

not sure if this is what you'r looking for nnew= nold