Because of his accumulated years of knowledge about psychology, dr. hernandez has decided that his fiftieth birthday would be the perfect time to begin writing an introductory psychology textbook. it would demonstrate his
a. factor analysis
b. fluid intelligence
c. predictive validity
d. crystallized intelligence

It would demonstrate his crystallized intelligence

Explanation:

Crystallized intelligence includes knowledge that arises from previous learning and former practices. Reading comprehension and vocabulary exams involve conditions that need crystallized intelligence. Crystallized intelligence is the strength to practice the knowledge that was earlier earned through study and activity.

You employ crystallized intelligence when you face responsibilities that want the application of beforehand obtained knowledge.  As we mature and incorporate new knowledge and intelligence, crystallized intelligence enhances more powerful. The more accumulated knowledge you have, the more crystallized intelligence you will possess. Here based on his experience knowledge he planned to write a book.

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

answer; block grants;