Which statement best describes the electronegativity of an element?

• Electronegativity of an atom is it's ability to produce energy while losing an electron.
• Electronegativity of an atom is it's ability to attract electrons during bond formation.
• Electronegativity of an atom is it's ability to lose electrons during cation formation.
• Electronegativity of an atom is it's ability to share electrons during a covalent bond formation.