The pronoun <em>her </em>is used as C) object of preposition in this sentence. <em>Between </em>is the preposition, and the pronoun is used as its object.
The answer is:
My mother is very tall but my father is even taller.
Conjunctions join clauses, words and phrases and they are usually used to avoid a sequence of short sentences. For example, <em>and, but, </em>and <em>or</em>.
In this case, the most suitable sentences to combine with a conjunction like "but" are the ones whose subjects are related (mother and father) and whose predicates have a similar structure: both describe height and one has a comparative form of the adjective tall, so they can be easily joined.
The last of a series of causes, although not necessarily the proximate cause,of an effect or result... Furthermore,the effect or result produced by the proximate cause would have occurred even if there would be a subsequent action,event or force that contributed to the eventual effect or result
