Maria, Susan, Josh, and LaShonda are exploring in a cave. Suddenly, Susan is injured by a rockslide and requires an immediate blood transfusion. Fortunately, all four are experienced medics and have all the equipment they need to perform a transfusion. Everyone knows his or her blood type. Who should volunteer to provide blood for Susan, and why

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

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explanation:

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sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely