Why have locks been created between the great lakes and the st. lawrence river? elevation between the areas is different to slow the shipping that goes through them to produce hydroelectricity to prevent flooding

Why are mangrove swamps an important part of the ecosystem of west africa?

Scientist believe that earths core is around 6000°c where does this heat come from

Match the following terms and definitions a region in arkansas defined by the arkansas river in the western part of the state answer 1 a thoroughly dissected area with steep valley walls and narrow floors answer 2 a geographical region of a country or state answer 3 the friendly and generous reception and entertainment of guests, visitors, or strangers answer 4 the branch of knowledge concerned with the production, consumption, and transfer of wealth answer 5 statistical data relating to the population and particular groups within it answer 6 a mountain range in west central arkansas and southeastern oklahoma answer 7 travel for pleasure or business; also the theory and practice of touring, the business of attracting, accommodating, and entertaining tourists, and the business of operating tours answer 8 answer all parts of the question.