What do you mean by fundamental rights​

Fundamental rights are a group of rights that have been recognized by the Supreme Court as requiring a high degree of protection from government encroachment. These rights are specifically identified in the Constitution (especially in the Bill of Rights), or have been found under Due Process. Laws encroaching on a fundamental right generally must pass strict scrutiny to be upheld as constitutional

d.) continue to rise rapidly

taking a bath requires the most water out of the given options because it takes a significant amount of water in order to fill a bathtub.