"The proposition of Elijah is reasonable. The people dare not evade it, and they find courage to answer: The word is good. The prophets of Baal dare not dissent or evade the matter. God has directed this trial and has prepared confusion for the authors of idolatry and a signal triumph for His name. The priests of Baal dare not do otherwise than accept the conditions. With terror and guiltiness in their hearts, while outwardly bold and defiant, they rear their altar, lay on the wood and the victim, and then begin their incantations, their chanting and bawling, characteristics of pagan worship. Their shrill cries re-echo through forests and mountains: “O Baal, hear us.” The priests gather in an army about their altars, and with leaping, and writhing, and screaming, and stamping, and with unnatural gestures, and tearing their hair, and cutting their flesh, they manifest apparent sincerity. 3T 281.2"
"And call ye on the name of your gods, and I will call on the name of the Lord: and the God that answereth by fire, let him be God. And all the people answered and said, It is well spoken."
The EGW passage elaborates on the details of the confrontation between Elijah and the prophets of Baal, directly referencing and expanding upon the events described in 1 Kings 18:24. It describes the actions and emotions of the prophets of Baal, which are implied but not explicitly detailed in the verse.