The correct answer is D :)
The stage at which the development of the brain reaches its adult is the middle childhood. A child's Brain undergoes a period of development from birth to three-producing more than a million neural connections each second. This development is influenced by many factors, which include the child's relationships, experiences and environment.
Answer: the need of evolution
Explanation: Charles Darwin saw the differences between the birds beaks in the Galapagos island. The beaks were different because of the different food that the environment provides.
