Question

which sequence shows increasing ecological levels of organization? ecosystem, population, organism, community; community, ecosystem, population, organism; population, organism, ecosystem, community; organism, population, community, ecosystem

Explanation:

To determine the correct sequence of increasing ecological levels of organization, we recall the hierarchy: organism (individual) → population (group of same species) → community (groups of different species) → ecosystem (community + environment). Now we analyze each option:

• First option: ecosystem (high) → population → organism (low) → community – incorrect order.
• Second option: community → ecosystem → population → organism – incorrect (ecosystem is higher than community, then decreasing).
• Third option: population → organism (decrease) → ecosystem → community – incorrect.
• Fourth option: organism → population (same species group) → community (different species groups) → ecosystem (community + environment) – follows the increasing order.

Answer:

The fourth option: organism, population, community, ecosystem