A is the one so she could spot the differnece with natural and the unnatrual decline
C, erosion. Erosion is the natural process of breaking down natural products through wind, or similar natural resources.
Answer:D - adding a catalyst
Explanation:
Since each Chlorine molecule is -1 and wants to gain an electron, 2 Chlorine atoms like to come together to form Cl2 by sharing 2 electrons each to form a single bond between the 2 atoms. Since both Chlornine has the same electronegativity, the bond is non-polar covalent since there electrons are evenly shared.