Elements ------------------> Formulae
a). Sodium ---------------> Na
b). Potassium ----------> K
c). Calcium --------------> Ca
d). Barium ---------------> Ba
Answer:
A.
Explanation:
It would be A. because the question is asking how the harmful chemicals have an effect on the environment. This answer also proves that even though we don't mean to harm the environment it still happens because we are using these chemicals for things in our daily life.
Well for the paper clips, she could use magnets to get them out... Then with the salt and the gravel , she could just pick up the gravel, then sweep the salt into another pile.... idk if this was what you're looking for but it is realistic.