Final answer:
The term matching the given definition is 'juvenile,' which refers to a young person or organism that has not reached full maturity. Legally, childhood lasts from birth until adulthood, which varies by jurisdiction. Biologically, it includes infancy, early childhood, middle childhood, and pre-adolescence.
Step-by-step explanation:
The task refers to finding the correct term that matches the definition of juvenile or immature. A juvenile is an adjective and sometimes a noun that describes a young person or organism that has not yet reached full maturity. In sentences, it could be used as follows:
- In legal terms, a juvenile court focuses on crimes committed by individuals who are not yet considered adults.
- The immature behavior of the high school students got them into trouble during the field trip.
- Most mammals care for their young when they are in an immature state, providing them with food and protection.
From the provided information, we understand that legally, childhood spans from birth to the age of majority. This variation in defining adulthood can be based on various legal thresholds such as the age for military service or alcohol consumption. Biologically, childhood extends from birth to adolescence, covering stages such as infancy, early childhood, middle childhood, and pre-adolescence.