Answer:
leaf veins ..........................
Explanation:
It depends upon some factors like
Major factor
- Your age
- Your lifestyle
- Your size
Other factors
- Some hormones
- Some medicine
- Being unwell
Because they Both work together to filter the water. Also without them Precipitation wouldn't occur and there wouldn't be any water cycle.
The hole reason for natural selection is to keep the Eco system in balance take something away it will fall apart or if you put to much of something the same thing will happen.
