# As atoms of elements in Group 16 are considered in order from top to bottom, the electronegativity of each successive element

$(a)\;\text{increases} \\(b)\;\text{decreases} \\(c)\;\text{remains the same} \\ (d)\;\text{zero}$

As atoms of elements in Group 16 are considered in order from top to bottom, the electronegativity of each successive element is increases.
Hence a is the correct answer.