In terms of brain size and overall intelligence, which of these best describes hominid evolution over the last few million years?
a) brain size and intelligence have increased
b) brain size and intelligence have decreased
c) brain size has decreased and intelligence increased
d) brain size has increased while intelligence has decreased

The correct answer is option A

During the course of evolution, the brain size of human beings have increased and it has led to many types of advancements in the human beings. Earlier, the brain size used 2% of the total energy of the body and now it uses 20% of the total energy of the body. As the environment changed and became unpredictable the brain size became large and helped the ancestors to survive.

This brain size can store a lot of information and utilizes a lot more energy and blood flow.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]