If a star is 7.5 light years (ly) away how long would it take the light from that star to reach Earth

Looking at this image, what relationship can be drawn from it? the lower the degree of latitude, the lower the degree of temperature there is no relationship between latitude and temperature the higher the degree of latitude, the higher the degree of temperature the lower the degree of latitude, the higher the degree of temperature

How does human environment effect the biosphere

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?