Answer: salt
Freshwater is defined as having a low salt concentration, usually less than 1%.
Explanation:
Freshwater refers to the bodies of water that contain very low levels of dissolved salts. So, freshwater are unique for their low salt content (about 0.5% of salt) compared to the sea water with high salt content.
Examples of freshwater include rivers and spring
The answer could be either B or D. Both are important for marine biology. I would have to say D is the best answer though!
Answer:
C
Explanation:
A scientist who studies objects in the sky, including planets, galaxies, blackholes, and stars
