Which one of the following is the correct sequence about various levels of organization of Biosphere?

The levels of ecological organization represent a hierarchy of biological complexity, ranging from the individual to the entire planet. The correct sequence from smallest to largest is Organism, Population, Community, Ecosystem, and finally Biosphere. An organism (or individual) is a single living entity. A population consists of a group of individuals of the same species living in a specific area. A community is formed by various populations of different species interacting within a habitat. An ecosystem includes these biotic communities interacting with their abiotic physical environment [2]. The biosphere is the highest and broadest level, encompassing all ecosystems on Earth where life exists, integrating the hydrosphere, lithosphere, and atmosphere [1]. Option 4 correctly follows this progressive hierarchy from the simplest unit to the most complex global system.

Sources

1. [2] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 1: BASIC CONCEPTS OF ENVIRONMENT AND ECOLOGY > COMPONENTS OF AN ECOSySTEM. > p. 16
2. [1] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 1: BASIC CONCEPTS OF ENVIRONMENT AND ECOLOGY > Biosphere > p. 10