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.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

it is a part of john locke's natural rights popular during the age of enlightenment that people had inalienable rights to life, liberty and property. this was reflected by thomas jefferson in his declaration of independence as rights to life,liberty and the pursuit of happiness.

another line in the declaration of independence is that people have certain rights just because they are human. humans are capable of obeying the three natural rights john locke mentioned making them governable by these laws and therefore entitled to these rights as well.