3 Which of the following statements best describes the significance of the ocean to humans?
ОА. The ocean is largely unexplored, so much of what exists there is still unknown.
OB. The ocean can be both dangerous and unpredictable if not treated with respect.
OC. The ocean is a source of oxygen, water, food, minerals, and other resources.
OD. The ocean is home to some of the oldest and most primitive species on Earth.
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i think its 100

i hope this !

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.