Why did thomas edison vow that he would work only on ideas for things that people would buy?

The answer is "no government would buy his first patented invention. "

Thomas Edison vowed that he would not waste his time creating things that individuals would not purchase. The possibility of just outlining inventions that individuals would purchase was not just for monetary advantage for the sake of Edison however was for the headway of all humankind as I would like to think. On the off chance that individuals would purchase his inventions or items then he was enhancing existing conditions of life for individuals all over. The promise that Thomas Edison made gives an inclination that he was in it for himself however I think the specific thought that his creations could change the world and enhance correspondence measures was the fuel that enabled Thomas to hold on. Despite the fact that he made the pledge to not invent things without advance, Edison needed to take in significantly more ways that didn't work before he could discover achievement.

answer: stupidity. they should wait till they can get reward money.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.