Introduction:

Biological organization is a definite series of biological structures and systems that defines life. In it, each level represents the organizational complexity. Every level is termed as the object, and each object is composed of the previous level's object.

Correct answer:

Among the answers given, the correct answer is option (b), communities exist within population which reside in the ecosystems.

Explanation/justification for the correct answer:

Option (b) is communities exist within population which resides in the ecosystem. Many populationtogether form the communities. So, communities do not form the population, but populations form the communities. Further, ecosystem is composed of many communities not of populations. Hence, this option is correct.

Explanation for incorrect answer:

Option (a) is tissues exist within organs which exist within organ system. The living body is composed of many organs which together forms the organ system. Further, the organs are composed of various tissues. So, tissues form the organs and organs in turn forms the organ system. hence, this option is incorrect.

Option (c) is organelles exist in cells andthey form the tissues. Cell is the fundamental unit of the life. Cell contains many organelles in its cytoplasm and their function is to maintain life by processing metabolism. Many cells then form the tissues. Hence, this option is incorrect.

Option (d) is communities form the ecosystem which exist in biosphere. Different communities come together to form the ecosystem. Many ecosystems combine to form the biosphere. Hence, this option is incorrect.