Which statement in the paragraph makes a clear distinction between potential and kinetic energy? John read this paragraph about two kinds of energy:

Potential energy is stored energy, or energy that is not being used. A standing bowling pin at the end of an alley has potential energy because it is not moving. Kinetic energy is energy of motion. A falling bowling pin has kinetic energy. An object’s energy changes from potential energy to kinetic energy when it moves.

Which number is main idea form this paragraph? (1) in 1960, raising a child from birth to age 18 cost just over $25,000. (2) however, raising a child today is an expensive business. (3) the average cost now is just about $230,000. (4) housing takes the biggest chunk of money, about $70,000. (5) that is followed by the cost of food, which runs about $42,000, and following closely after that are the expenses of child care and education, transportation, health care, and clothing. (6) the cost averages out to about $12,800 a year, or about $1000 a month, to raise one child in a two-child, two-parent, middle-income family.