A. Sea water
B. Brass
C. Tape water
D. Graphite
E. Sand
D. Graphite
All of the listed items, except “Tape water”, are substances. A substance is a material with a fixed chemical composition and defined properties, such as a specific density or melting point.
Sea water is a mixture of salt and water. Brass is an alloy made of copper and zinc. Graphite is a naturally occurring form of carbon. Sand is a naturally occurring mixture of minerals and rock fragments.
“Tape water” is not a substance, but rather a description of water used for taping purposes, such as in construction or repair work.