Why do meteorologist refer to it as tri cellular circulation of the atmosphere

Adeveloping nation's economy is based on a developed nation's economy is based on stay tuned- i may post some more questions from my study guide : )

Suppose that tou work for a fried snack food. company. news channels have televised reports encouraging people to eat heathly snacks.write a report to your manager that explains the recent decrease in sales and offer ways that the company can reverse this trend

The primary agent of contact metamorphism is