As discussed in your text, Henry Molaison (H. M.) lost extensive tissue in the inner part of both temporal lobes, including the hippocampus and amygdala in both hemispheres. The type of declarative memory problems experienced by Molaison are frequently produced by damage to the .a. cerebral cortexb. hippocampusc. amygdalad. corpus callosum

B. hippocampus

Explanation: Hippocampus is one of the major component part of the brain in vertebrates,it is the main regulator of EMOTIONS, MOTIVATION,MEMORY AND LEARNING.

Generally, mammals have two Hippocampi which are located on both the left side of the brain and on the right side of the brain.

WHEN THE HIPPOCAMPI IS DAMAGED,THE PERSON INVOLVED WILL EXPERIENCE MEMORY LOSS AND HE OR SHE MAY NOT BE ABLE STORE INFORMATION FOR LONG TIME.

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals