Question

around 10.5. that is more basic than baking soda and almost alkaline as ammonia and bleach. this alkalinity is due to high concentrations of a chemical called natron. natron is a combination of sodium carbonate and naturally occurring baking soda. sodium carbonate is the substance that the ancient egyptians used to dry out mummies! contact with the lake water can cause chemical burns to many animals or people. however, as in many harsh natural conditions, life has found a way to exist in lake natron. in fact, the existence of one species explains why the lake is red. salt - loving red algae thrive in the lake. the salty water is not the only reason why this specific type of algae does well; the algae blooms best when the lake temperature reaches 140°f (60°c). the hotter lake natron gets, the redder it becomes. a toxic type of bacteria exists in the algae blooms, and for most animals, when they eat it, they become very sick. a species of flamingo has adapted to the unusual lake conditions, too. these smaller flamingos have thick skin on their legs that does not get burned in the waters of lake natron. the flamingos get their pink coloration from eating lots of the red algae. most species of fish cannot live in lake natron because they cannot eat algae do not make an enzyme are eaten by animals that visit the lake have been outcompeted by the fish that live there

Explanation:

The text mentions that the water of Lake Natron is highly alkaline due to natron, and has toxic bacteria in red - algae blooms. These harsh conditions are not suitable for most fish species.

Answer:

None of the options provided are correct based on the given text. The main reasons most fish cannot live in Lake Natron are the high alkalinity and the presence of toxic bacteria in the algae, not the reasons given in the options (inability to eat algae, not making an enzyme, being eaten by other animals, or out - competed).