What is ecosystem ? Explain its two components .

Explanation

### Step-by-Step Text Solution:

**Step 1: Definition of Ecosystem**
An ecosystem is defined as a basic functional ecological unit where living organisms interact with each other and with their physical environment. The term "ecosystem" was introduced by Sir Arthur George Tansley in 1935. It encompasses all living (biotic) and non-living (abiotic) components in a specific area.

**Step 2: Global and Local Ecosystems**
Ecosystems can vary in size from small, localized systems like a pond to larger systems such as forests or oceans. The entire biosphere, which includes all ecosystems on Earth, is referred to as the global ecosystem.

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