Which describes a major contribution by antoine lavoisier to the science of chemistry? he to change the emphasis of research from observation to measurement. he discovered and correctly identified the presence of oxygen and nitrogen in air. he established commissions to provide for government funding of research.

He helped to change the emphasis of research from observation to measurement.

Explanation:

He developed the metric system. He is known for stoichiometry. He identified the presence of oxygen and hydrogen. He proved that oxygen is involved in combustion. He confirmed that matter may change shape and size but matter remains constant. He predicted the existence of Si  and proved that S is an element and not a compound as was otherwise believed.  

it's all four options.