The uppermost zone in lakes and ponds, which is close to the shore and rich in nutrients is called the
a.
benthic zone
b.
limnetic zone
c.
pelagic zone
d.
littoral zone
i believe its b but want a second guess cause i dont want to get it wrong

d.  littoral zone

Explanation:

The littoral zone is the zone which lies close to the shore of the aquatic water body. It remains partially submerged with shallow water. It is the uppermost zone of the aquatic water body. It is the part of lakes, river, pond and sea. It receives maximum sunlight. It is rich in nutrients as it receives carbon dioxide and oxygen directly from the atmosphere. It is suitable zone for the growth of plants and phytoplanktons which can also support the diversity of aquatic fauna in this zone.  

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d