Coral bleaching that occurs because of the introduction of foreign substances is
a. solar irradiance
b. dilution
c. xenobiotics
d. harvesting

Coral bleaching that occurs because of the introduction of foreign substances is xenobiotics. The answer is letter C. Also, it is caused by the changes in conditions such as temperature, light or nutrients and therefore expel the symbiotic algae in their living tissue.

answer: mercury

explanation:

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).