Some coral reefs off the east coast of South America are starting to die off. Satellite images reveal great plumes of sediment washing out of the mouths of rivers. What can you conclude, if anything, about the relationship between these two factors?

A. Although the two factors coincide, they are not likely to be related.
B. Deforestation on land results in lower oxygen levels in the atmosphere, which stresses the reef.
C. Deforestation on land allows erosion to wash away topsoil, which smothers reefs.
D. Burning of the rain forest increases atmospheric carbon dioxide to levels toxic to reefs.

What best explains whether bromine (br) or neon (ne) is more likely to form a covalent bond? bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. bromine forms covalent bonds because it has many electron shells, but neon has only two electron shells and is tightly bound to its electrons. neon forms covalent bonds because it can share its valence electrons, but bromine has seven valence electrons and can gain only one more electron. neon forms covalent bonds because it has only two electron shells, but bromine has many electron shells and will lose electrons in order to fulfill the octet rule.