What is considered the "brain" of the brain?

pons
cerebellum
hypothalamus
thalamus

How can a person  best  reduce the risk of injuries on the road?  

The bones of the extremities are parts of the a-appendicular skeleton b-axial skeleton c-long bone group d-medial skeleton

What is one way that cold and flu viruses spread? a.by transfusing contaminated blood b.by inhaling contaminated droplets c.by eating contaminated meat d.by drinking contaminated water