Why are Fundamental Rights more secure than ordinary rights?

The correct answer is Option 4 - They are guaranteed by the Constitution and require a constitutional amendment to change

The security of Fundamental Rights comes from their protection and guarantee by the Constitution, making them harder to change.

Fundamental Rights are different from other rights available to us. While ordinary legal rights are protected and enforced by ordinary law, Fundamental Rights are protected and guaranteed by the constitution of the country. Ordinary rights may be changed by the legislature by the ordinary process of law-making, but a fundamental right may only be changed by amending the Constitution itself. Besides this, no organ of the government can act in a manner that violates them.