All of these played important roles!
The mining industry enabled the excavation of many important and precious minerals which wre later used in differetn technological applciations.
The railroads increased the speed by which things were being transmitted.
The cattle business enabled people to sustain themselves through food.
The homestead act enabled people to become self-sufficient. 
        
             
        
        
        
<span>Nancy is a 4-month-old infant who utters repeated vowel sounds such as "aah and ooh." until 6 months of age, her speech consists almost exclusively of vowels. nancy is said to be in the Babbling stage of language development.
The correct answer is C. Babbling Please give me branliest answer</span>
        
             
        
        
        
Answer:
Atkinson-Shiffrin model
Explanation:
The multi store model of memory which is  called the modular model was proposed by Atkinson and Shiffrin and is a basic model. They recommended that memory comprised of three stores: a tangible register, momentary memory (STM) and long haul memory
The Atkinson–Shiffrin model which is otherwise called the multi-store model or modular model is a model of memory proposed in 1968 by Richard Atkinson and Richard Shiffrin a transient store, likewise called working memory or momentary memory, which gets and holds contribution from both the tangible register and the long haul store,
 
        
             
        
        
        
Apparently it was built on august 15, 1620