Answer:
Explanation:
Solar Irradiance: Solar irradiance is the total heat energy received from sun per unit time and per unit area. Its unit is watts per square meter.
Solar irradiation: Both solar irradiation and solar isolation are a measure of time integrated solar energy. The solar energy received per unit area over a fixed time period( hour, day, month, year, ect.) is called solar irradiation or solar isolation.
Peak Sun hours: Peak sun hours are those hours of the day when we receive maximum magnitude of solar irradiation or isolation. Amount of irradiation keeps changing with seasons, altitude, etc.
La característica en común es que esos países subdesarrollados concentran la mayor cantidad de empleos en el sector terciario o de servicios. Espero que te ayude!
