What do the magnetic field lines around a bar magnet represent?

Correct option is C

Correct option : (c),  The direction and strength of the magnetic field

The magnetic field lines around a bar magnet represent the direction and strength of the magnetic field produced by the magnet. 

Information Booster: 

• Direction of the Magnetic Field:  Magnetic field lines originate from the north pole of the magnet and curve around to enter the south pole.
• Strength of the Magnetic Field: The density of the lines indicates the strength of the magnetic field.
• Path of Magnetic Force: A compass placed near the magnet aligns itself along these field lines, showing the direction of the magnetic force at any point.
• Properties of Field Lines: They are strongest near the poles of the magnet and weaken as they move farther away.