Which organisms create all usable food energy on earth? consumers decomposers heterotrophs producers

producers

Explanation:

The organisms that create all the usable food energy on Earth are called the producers. These organisms are able to produce food through the different resources such as the energy from the Sun, the carbon dioxide, and water and minerals that they absorb from the soil. 

"Normal" rainfall is slightly acidic because of the presence of dissolved carbonic acid. Carbonic acid is the same as that found in soda pop. The pH of "normal" rain has traditionally been given a value of 5.6. ... The non-metal oxide gases react with water to produce acids (ammonia produces a base).

The answer is true