The correct sentence is:
Each person’s brain develops and forms new connections, but it is not aware of these changes.
The antecedent of the pronoun "it" is "each person’s brain".
They got eaten or died cuz the lake was too cold
A line of poem is one row of words.
Also, a line of a poem is used to divided the poem into sections.
Your answer is A. Hope this helps have an amazing day!!! :D :D :D