In london, peppered moths that were light colored blended in with trees of the area, and were well populated. over time, pollution caused the bark of the trees to darken, causing a shift in the number of light colored moths seen. the darker colored moths survived the predators since they were able to blend in with the darkened tree bark, and they reproduced rapidly.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

answer denitrification;