The limestone used in building the Egyptian pyramids was used because it is O soft and sticky
O easily melted
O hard and brittle

Easily melted

The answer is on here already but ya that’s the answer

Conservation efforts have been effective in "increasing the number of endangered species, reducing all the negative impacts of human activity, and preserving wildlife habitats".hope my answer has you : ) 

Ionic compounds dissociate into component ions dissolved into a solution creating substances called "electrolytes".hope my answer has you : )