Read the paragraph and dictionary entry. When the state council on the arts first announced plans for a new arts center, people in our area immediately showed interest. My neighbor, a city planner, volunteered his time to complete a study. His study showed that our area could support the additional traffic the center would likely create. Since he was instrumental in bringing the arts center to our area, the council honored him with a plaque at the opening night party. Dictionary instrumental (in stroo . mental) adj.
1. relating to an essential influence or agent of action
2. associated with, created for, or performed by musical instruments
3. conducted with, or related to, an instrument or device
4. relating to a philosophy focused on determining the value and helpfulness of ideas

When Curtis first read this paragraph, he thought the word instrumental meant "significant."
Which dictionary entry shows that Curtis's understanding of the word instrumental was correct?
a. entry 1
b. entry 2
c. entry 3
d. entry 4

just search google

explanation:

google is the best

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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