This is the condition in which one living organisms serves as a food source for another?

lichen   if i could get brainliest that would be great

Explanation:

often lichen, that colonize barren rock or lava during primary succession and help in the development of soil so other organisms may follow. This is the condition in which one living organism serves as a food source for another. This is an animal that lives by preying on other animals.

it's the release of intestinal gas, which forms as a result of digesting food. when partially digested carbs reach the colon, bacteria convert part of that food into hydrogen and carbon dioxide gasses. you cant stop the stink, its a gas that comes naturally.

explanation: