Round and Red and part of your blood
Answer:
Salinity in an estuary varies according to one's location in the estuary, the daily tides, and the volume of fresh water flowing into the estuary. In estuaries, salinity levels are generally highest near the mouth of a river where the ocean water enters, and lowest upstream where freshwater flows in.
Explanation:
The answer is Glucose because chlorophyll is a part of a plant cell and so is a chloroplast and CO2 makes the plant photosynthesise so the answer is C Glucose