Name the most abundant element next to C, H and O in higher plants.

Explanation

**Step-by-Step Solution:**

1. **Identify the Elements**: The question asks for the most abundant element in higher plants after carbon (C), hydrogen (H), and oxygen (O). These three elements are the primary components of organic molecules in plants.

2. **Recall Common Elements in Plants**: After C, H, and O, we need to consider other elements that are essential for plant growth and development.

3. **Consider Nitrogen**: Among the elements commonly found in plants, nitrogen (N) is known to be the most abundant after C, H, and O.

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