It is an example of directional selection.
The different kinds of natural selection can influence the distribution of phenotypes within a population. In stabilizing selection, an average phenotype is preferred.
In directional selection, a modification in the surrounding changes the spectrum of the observed phenotypes, and in diversifying selection the extreme values for a trait are preferred over the transitional values. This kind of selection usually pushes speciation.
The directional selection, in the field of population genetics, refers to a mode of natural selection in which an extreme phenotype is preferred over other phenotypes, making the allele frequency to change with time in the orientation of that phenotype.
Wind because its not mechanically eroding them..
They may depend on PH of the water, nutrients, and sunlight.
The polarity of the water molecule helps it to cohere to nearby water molecules, forming a skin over it.
I’m sorry I’m not smart I don’t know I just need answers for my questions