Alden is beginning to learn how to write. He can hold a pencil in one hand and steady the paper with his other hand. This new ability to coordinate the duties of his right and left hands is likely due to .

the growth of his corpus callosum

Explanation:

Alden is beginning of learning, and her coordination from right to left right is due to the growth of his corpus callosum. As the growth of his corpus callosum is responsible and made from fibers which play role to communicate two different sides of mind i-e right hemisphere and left hemisphere. corpus callosum is like message transmitter from one to another hemisphere.

to stay where they were until m sent for

levels of production can be increased by technology while holding labor and capital constant, because increased technology makes the production process more efficient. subsequently, the lras curve is almost a vertical line, that can shift to the right, with an increase in technology.

the relationship between the lras curve and the ppc is that both can make the economy could grow. the ppc achieves that when it shifts outward because of more resources or technological advances while the lras curve shifts if more resources are developed or if there are technological advances.

the lras curve is a vertical line at an output level that represents the number of goods and services a nation can produce over a sustained period using all of its productive resources as efficiently as possible with all of the current technology available to it.

the production possibilities frontier (ppf) is a graphical device that is used for economic analysis of production decisions because the ppf measures the maximum possible combinations of two goods that an economy is capable of producing with its currently available resources and technology.