What can declare laws unconstitutional

Criminalnology is an empirical science which encompasses the following areas of study

Do we actually do work like math, reading, etc? ?

3. meena and ala are two friends. meena has a habit of using new pens almostevery day, whereas ala believes in getting a refill for her pen instead of buyinga new pen even though her friends make fun of her.a) which out of two practices would you follow and why? b) which value is ala depicting?