The natural distribution area of Common hackberry is located in eastern North America. The tree is susceptible to fire damage. The fruits are eaten by birds and other animals.
Memory development. The development of memory in children becomes evident within the first 3 years of a child's life as they show considerable advances in declarative memory. This enhancement continues into adolescence with major developments in short term memory, working memory, long term memory and autobiographical memory.
In the second six months of life, babies begin to babble in the language of their parents and other caregivers. Babies and toddlers do not understand words out of context. Instead, they understand words in combination with your gestures, tone and facial expression. By 18-24 months, toddlers begin to use action words. These words express what they see or want, leaving out adjectives and other grammatical conventions.