What is the approximate distance in miles between new york city and philadelphia

At which point on the diagram do convection currents occur to drive plate movement?

Which barrier to economic development is shown in the following examples? i. the high rate of hiv infection in underdeveloped nations ii. the use of children as soldiers in uganda’s army in the early 2000s iii. low literacy rates in underdeveloped nations with limited exposure to adequate education a. foreign debt b. political instability c. widespread disease d. low levels of social welfare

Where the main factor that enabled the growth of cities and civilizations was the existence of