Plz i will give you a brainy and maybe give some points

explanation:

crosscutting concepts have application across all domains of science. as such, they are a way of linking the different domains of science. they include patterns; cause and effect; scale, proportion, and quantity; systems and system models; energy and matter; structure and function; and stability and change.

b.

the accuracy of the data.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.