When chlorophyll is in the presence of acidic molecules (compounds that easily share their hydrogen atom), the magnesium is dislodged and replaced by hydrogen atoms. This simple structural change alters the colour of chlorophyll from light green to yellowish green. -hope this helps!
D. Reduces the intensity of a light source

Nanotechnology is helping to considerably improve, even revolutionize, many technology and industry sectors.
Hopefully, this helps you!!
