The most familiar and common drainage pattern is

The most familiar and common drainage pattern is dendritic, its name comes from its resemblance to a dendrite, ramifications of the neurons, this term is used for any form that is subdivided, such as the branches of a tree, the veins of leaves, or human beings ,  or the pattern of sewer system, they all are dendritic.

This is what i found on google“ the monomers combine with each other via covalent bonds to form larger molecules known as polymers. in doing so, monomers release water molecules as byproducts. this type of reaction is known as dehydration synthesis, which means “to put together while losing water. in the process, a water molecule is formed.” i hope this you