Why do ecosystems tend to form broad belts

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies?

When geographers describe how two places are related to each other spatially, they are describing a. where the places are located in relation to one another b. what kinds of natural environments are around each place c. how each place is changing over time d. what kinds of cultures are in each place

Which statement best describes how chemical equations demonstrate conservation of mass?