Which of the following is a reason to use shielded wire?

Shielded wire consists of a central conductor surrounded by a grounded metallic braid or foil. This outer shield acts as a Faraday cage, blocking external electromagnetic interference (EMI) from reaching the inner signal wire, while also preventing the inner signal from leaking out. Shielding is crucial in environments where radio frequencies (RF) are present to maintain signal integrity and avoid unwanted coupling (interference) between different cables and devices. Using shielded wire does not decrease DC resistance or increase current carrying capacity. Those characteristics are strictly determined by the wire's gauge (thickness), not whether it has a shield.