Answer: Option (b) is the correct answer.
Step-by-step explanation:
Induction is defined as the process in which flow of charges take place form one body to another when both of them come in contact with each other.
And, an object becomes insulated when an opposite charge leaves the object by touching another object. As new charge from the ground cannot enter the object to neutralize the object.
Therefore, in this way there will be only one type of charge is present on the object.
Thus, we can conclude that the statement charges can escape the object, but new charges cannot enter it, best explains why the ( point) object should be insulated.