Me 12 year old step sis is crying :(me said I don't like her as gf help me

The outermost layer of your teeth is called the enamel and is made of?

What is the best way to use the clean water act to address the issue of dirty water and diseases that plague asmall community? a) to report the number of cases of people who havecholera symptomsb) to provide health guidelines about effects from waterborne diseases c) to enforce standards that focus on chemical dischargeinto bodies of waterd) to carry out research that investigates how dirty wateraffects human health

Is the smallest biological structural units of the body