Give a brief answer for the following:
What is symbiosis ?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Symbiosis**: Symbiosis refers to a close and long-term interaction between two different organisms or living things that belong to different species.

2. **Types of Symbiotic Relationships**: There are three main types of symbiotic relationships:
- **Mutualism**: In this type of relationship, both organisms benefit from the interaction. For example, bees and flowering plants; bees get nectar while helping plants with pollination.
- **Commensalism**: In this relationship, one organism benefits while the other is neither helped nor harmed. An example is barnacles attaching to a whale; the barnacles gain a place to live while the whale is unaffected.
- **Parasitism**: Here, one organism benefits at the expense of the other. An example is a tapeworm in the intestines of a host; the tapeworm gains nutrients while harming the host.
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