Answer:
a cold air mass and a warm air mass merge together
C is the breakdown of rock and soil on earths surface. Think of the grand canyon.
When all parts of a circuit ... all the way from one terminal of the
battery or power supply to the other terminal ... are composed of
conducting materials, then current can flow in the circuit, and the
circuit is said to be 'closed'.
The cycle of life because the tree starts to grow back in that spot.
The correct answer would be D.
