Did they take off comments from questions?? also free points

Which training principle states that exercising a certain body part are practicing a particular skill primarily develops that part or skill

Which step would a state health department most likely take to reduce lead exposure? promote health-planning operations to limit lead exposure at home. evaluate the number of countries affected by lead exposure. create general national guidelines for working with lead. carry out research on the worldwide effects of lead products.

How does nitrogen oxides are produced and their air environment impact