Concept:Equipment II is a brooder, which is an essential heat source for brooding chicks.
Explanation:Chicks cannot regulate their body temperature well and need warmth from outside.
Equipment II supplies this warmth during the brooding period.
An electric bulb produces heat and can readily serve as a replacement heat source for chicks.
Incubators are used for hatching eggs, feeders are used for supplying feed, and egg candlers are used to inspect eggs for quality — none of these can provide the required heat.
Because the main job of equipment II is to keep chicks warm, an electric bulb is the most suitable substitute.
Answer:C. Electric bulb
