If you are said to have blank, then you are full of energy, or the breath of life.
What is the blank?
Have you been given a list of words to choose from? Or are you supposed to guess?
One of the words listed in the left-hand column, maybe?
http://www.thesaurus.com/browse/vitality
The blank in this context is "vitality". If you are said to have vitality, it means you are full of energy or the breath of life.
The blank you are referring to is most likely "vitality."
To arrive at this answer, I used my knowledge base to understand the context and meaning of the question. The description provided informs us that if someone is said to have this quality, they are full of energy or the breath of life. This clue suggests that the word we are looking for relates to liveliness or being animated.
To find the answer, I used my understanding of synonyms and consulted a thesaurus. By searching for words related to energy, liveliness, and vitality, I came across the term "vitality," which matches the given description.
Hence, the answer is "vitality."