Before industrialization set in England :

Options

A. Only white winged moths were present on trees
B. White winged moths were less in number on trees
C. Dark winged moths were less in number on trees
D. White winged moths were absent

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question is about the population of moths in England before industrialization, specifically focusing on two types of moths: white-winged moths and dark-winged moths.

2. **Analyzing the Options**:
- **Option 1**: "Only white-winged moths were present on trees."
- This option is incorrect because both white-winged and dark-winged moths were present before industrialization.

- **Option 2**: "White-winged moths were less in number on trees."
- This option is also incorrect. Before industrialization, white-winged moths were more abundant due to lower pollution levels, which allowed them to thrive.

- **Option 3**: "Dark-winged moths were less in number on trees."
- This option is correct. Before industrialization, dark-winged moths were indeed less common compared to white-winged moths.

- **Option 4**: "White-winged moths were absent."
- This option is incorrect because white-winged moths were present in significant numbers before industrialization.

3. **Conclusion**: The correct answer is **Option 3**: "Dark-winged moths were less in number on trees."