Final answer:
Tanija's parents are practicing Enculturation by exposing their child to the culture they grew up in. This process allows Tanija to learn the customs, traditions, and practices of their native Russian culture.
Step-by-step explanation:
The concept of culture that Tanija's parents are practicing by joining a group of Russian immigrants to expose their child to the culture they grew up in is known as Enculturation. Enculturation is the process by which an individual learns the traditional content of a culture and assimilates its practices and values. In this instance, Tanija's parents are actively engaging in the enculturation of their child to their native Russian culture, by giving her exposure to the customs, traditions, and practices of the culture they themselves grew up in. This active engagement helps her to absorb and internalize these cultural components.
Learn more about Enculturation