You break a pencil lead. which statement is true?
a physical change has occurred, with no energy change.
a physical change has occurred, with energy being given off.
a chemical change has occurred, with energy being absorbed.
a chemical change has occurred, with energy being given off.

Option (A) is the correct answer.

Explanation:

A change that causes no difference in chemical composition of a substance is known as a physical change.

For example, breaking a pencil lead is a physical change because it divides the lead into two halves that is, no change in its chemical composition has occurred.

Whereas a change that brings difference in chemical composition of a substance is known as a chemical change.

For example,

Here, chemical composition of both carbon and hydrogen has changes as they chemically reacted together that leads to the formation of methane.

Thus, we can conclude that the statement a physical change has occurred, with no energy change, is true.

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.