What organs make up the central nervous system?
a. heart
b. brain and spinal cord
c. lungs
d. liver

B. Brain and spinal cord
The nervous system is an organ system in charge of sending messages to and from the brain and spinal cord to and from all parts of the body. 

B. Brain and Spinal cord. They send messages through the body about what is going on. They are the most important parts of the nervous system. 
Hope this helps. 

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.