Pl which change did not occur in the united states in the late 1800s? a. less expensive factory made clothing and appliances b. new technology on farms c. more time for leisure activities or d. an end to child labor.

C. Never happened. It was work all day to around 1940s

I think it's D. because I know for a fact that we still have child labor in the US, take Nike for example

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.

the of atp are the key to its ability to store and supply energy;

phosphate

the phosphate groups of atp are the key to its ability to store and supply energy. atp releases energy when it breaks bonds between its phosphate groups.