Answer:
It would be a BASIC substance
Explanation:
Basic is the opposite of acidic
Im just guessing so i think its a
My best guess would be c because b makes no since we as humans do not have photosynthesis and are considered living organisims, d is also wrong because the brain requires oxygen, and its not a because the brain is made of cells.
The answer is A, 'a mammal' because it goes with the copulative verb 'to be', i. e., 'is'.
The best answer to the question above would be letter d. The sentence presented which is 'Researchers helped further the biological perspective when they demonstrated that electrical stimulation of the brain could evoke emotional responses in animals.' demonstrates how new discoveries can influence perspectives.
