The life stage known as is a stage of transition during which you work to find your own identity and decide what kind of a person you want to be.

Answer is adolescence.

Explanation:

Adolescence is a stage or phase ,which is known as the transitional phase, when the psychological and physical developments occur.And it falls within the puberty and legal adulthood, that is , from age 10 - 19.

This stage has some specific characteristics , which are

1. There will be increase in decision making.

2. The rate of developments in the body will be increased, this is biological growth and development.

3. It is the time to start thinking and working towards the kind of individual to be.

4. increased pressure.

Adolescence

Explanation:

Adolescence is a transitional phase in life when a person develops of physical and psychological that generally occurs from the onset of puberty during which a young person develops from a child into an adult. It occurs during early teenage years.

Adolescence is a stage of life to that a person work to find their own identity and decide what kind of a adult he/she wants to be. The decide what to study in school, what skill to learn, which sport to engage in.

segmentation=endoskeleton=backbone=coelom=tissues

the missing space is phylum