Correct Answer - A
a. Littoral zone : Shallow water zone around the edge of the lake which supportys rooted vegetation . Light penetrates through this zone.
b. Limnetic zone :Open water zone beyond littoral zone is called limnetic zone. In limnetic zone, phytoplanktons grow in abundance.
c. Profundal zone : The dark zone where light does not reach is called profundal zone.
d. The sediments at the bottom of the lake and ponds form the benthic region.
