The symbol of an element refers to a unique abbreviation that is used to represent that element in chemical formulas and equations. The correct answer to this question is option 3 - Jöns Jacob Berzelius.

John Dalton, mentioned in option 1, was an English scientist who proposed the Atomic Theory in the early 19th century. While Dalton made significant contributions to our understanding of atomic structure, he did not introduce the concept of element symbols.

Antoine Lavoisier, mentioned in option 2, was a French chemist known as the father of modern chemistry. Lavoisier made important discoveries in the field of chemical nomenclature and the conservation of mass, but he did not introduce element symbols.

Robert Boyle, mentioned in option 4, was an Irish scientist who is considered one of the founders of modern chemistry. Although Boyle`s experiments and writings greatly contributed to the development of chemistry, he did not introduce element symbols.

Jöns Jacob Berzelius, mentioned in the correct option 3, was a Swedish chemist who played a crucial role in establishing the modern system of chemical symbols. He introduced a system of abbreviations for elements based on their Latin names, which is widely used in chemistry today.