Ecosystems undergo and are often shaped by disturbances. The of an ecosystem is a measure of how much disturbance it takes to alter the flows of energy and cycling of matter in that ecosystem, while the is a measure of the ability of that ecosystem to recover from a disturbance

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

One of the reasons that stars are so large is because

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.