To solve this problem, we need to identify which of the given options is an amino acid-derived hormone. Let's analyze each option:$\newline \bullet$Estradiol:$\newline$ - Estradiol is a steroid hormone derived from cholesterol. It is not derived from amino acids.$\newline \bullet$Ecdysone:$\newline$ - Ecdysone is a steroid hormone found in insects, also derived from cholesterol. It is not an amino acid-derived hormone.$\newline \bullet$Epinephrine:$\newline$ - Epinephrine, also known as adrenaline, is a hormone derived from the amino acid tyrosine.$\newline$ - It is synthesized in the adrenal medulla and plays a role in the fight-or-flight response.$\newline \bullet$Estriol:$\newline$ - Estriol is another steroid hormone derived from cholesterol, not from amino acids.$\newline$Based on the analysis, epinephrine is the only hormone in the list that is derived from an amino acid.$\newline$Therefore, the correct option is Option 3: Epinephrine.