Filter feeding is

Options

A. Holding food particles by closely appressed teeth
B. Picking food articles from a water current
C. Crushing and chewing of food and allowing only finely divided one to pass further
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Filter Feeding**:
- Filter feeding is a method of feeding primarily seen in aquatic animals. It involves the organism filtering out food particles from the water.

2. **Identifying Examples**:
- Common examples of filter feeders include sponges, certain mollusks (like clams), and some fish species (like baleen whales).

3. **Mechanism of Filter Feeding**:
- The process involves the animal opening its mouth to allow water to flow in. As the water enters, food particles suspended in the water are trapped by specialized structures (like gills or filter-feeding apparatus) within the organism.

4. **Evaluating the Options**:
- **Option 1**: Holding food particles by closely oppressed teeth - This describes a different feeding mechanism (masticating), not filter feeding.
- **Option 2**: Picking food particles from a water current - This accurately describes filter feeding.
- **Option 3**: Crushing and chewing of food - This is also not related to filter feeding.
- **Option 4**: None of the above - This is incorrect as option 2 is correct.

5. **Conclusion**:
- The correct answer is **Option 2: Picking food particles from a water current**.

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