The selective loss of unused connections among brain cells is called

Pruning

Explanation:

Pruning or synaptic pruning is brain's way of clearing unnecessary signals that are no longer needed. It mostly occur in childhood and adolescence because brain want to get faster by avoiding unused impulses in Synapses. Synapse is the space between neurons through which signals are being transferred.

Pruning of brain cells.

Explanation:

Basically, pruning is the removing of unwanted branches from a tree or in this case unwanted or unused connection removal among brain cells to increase their activity and speed.

Pruning of brain cells usually occurs in childhood and adolescence by removing of the unnecessary signals to increase the brain activity.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

b. read the phase at the intersection of any given temperature and pressure.