A shadow is a surface light cannot touch or reflect off of. Usually shadows appear when the main object is covering a light source. For example, lunar eclipses. Lunar eclipses cause a shadow over Earth because they block the main light source, The Sun from our point of view, casting a giant shadow over Earth.
If an atom is unstable it can become stable by the gain or loss of electrons.
Answer:
D. guard cells.. this is answer i think..
The correct answer would be D), over millions of years, Pangaea broke apart and drifted to form the seven continents.
B ecosystem. They include abiotic factors and biotic factors.
