Question

Algae, green plants, and photosynthetic bacteria are:
A)Autotrophic organisms
B)Heterotrophic
C)Decomposers
D)Consumers

Answer 1

Hint: These are very important organisms because without them knowing the forms of life can exist.these are the organism that can produce their own food using the materials from organic sources. Therefore they can also be called producers. They provide fuel to all the organisms that cannot make their own food. Thus, they formed the base of an ecosystem energy pyramid.

Complete answer:
-The word autotrophs are generated from two words i.e "auto" means self and "trophs" means food. Therefore these are the organisms that can produce their own food.
-The autotrophs are able to feed themselves without any assistance from other organisms.
-Autotrophs are classified according to the types of energy they obtained from different sources. These include photoautotrophs and chemoautotrophs.
-Photoautotrophs are the organisms that get energy from sunlight to make organic materials. It includes all the plants, green algae, and photosynthetic bacteria.

Additional Information: Heterotrophs - these are the organisms that cannot produce their own food by itself instead they make nutrients from other sources like plant or animal matters.
-heterotrophs are the primary, secondary and tertiary consumers in the food chain but they are not the producers.
Decomposers - it includes an organism that helps in decomposing or breakdown of organic materials. Most remains of dead organisms (plants and animals) are decomposed by them.
Decomposers are generally bacteria and fungi.
Consumers - these include the organisms that kill or depend on other organisms because they don't have the ability to produce your own energy.

So, the correct answer is,” Autotrophic organisms”.

Note: The organisms that are capable of producing their own food known as autotrophs. They use light energy, water, and carbon dioxide to make their own food. Some autotrophs use energy from the sun and are known as photoautotrophs and some use chemical energy to make their food and known as chemoautotrophs.
-Inorganic sources are used by autotrophs to make their food and they are also commonly referred to as primary producers because they occupy the base of the food chain.