Explanation: FET and CMOS devices are highly susceptible to damage from electrostatic discharge (ESD) due to their internal structure. These devices, particularly MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) which are the basis for CMOS technology, have extremely thin insulating layers (gate oxides) separating the gate from the channel. Even a small static charge from your body can generate enough voltage to puncture or break down this delicate oxide layer, permanently damaging the device. This damage might not be immediately apparent but can lead to device failure later. Other options are incorrect because: A) While leads can be delicate, this isn't the primary, unique precaution required for FET/CMOS compared to other components. C) Micro-welded junctions are part of general semiconductor manufacturing, but their susceptibility to breakage isn't the main "special precaution" concern for these specific devices. D) Most FET/CMOS devices are not light-sensitive in a way that requires special handling precautions, unlike actual photodiodes or phototransistors.