He applied his skill in engineering to toughen up the defence
Answer: During that night, Muhammad began to receive the revelation according to the Muslim belief.
Explanation:
During that night, Muhammad began to receive the first fragments of the revelation woven into the holy book of Muslims, the Quran. It happened in Ramadan (September), so that month is of great importance for Muslims. Muhammad, as Muslims believe, began to receive revelation while sleeping in a cave called Hira. After that, he began to propagate Islam.
According to Erickson's theory of psycho-social development, and going by the description above, Tom is demonstrating FIDELITY.
The stage of Fidelity occurs during adolescence (Age 12-19) which should be the range of Tom's age, being an high school senior. His goal and dedication to become a Medical Doctor characterizes the existential question of the Fidelity Stage: Who am I? Who can I be?.
