Is one who falls into a hole and dies considered among the martyrs?

Question:
From the State of Kuwait, the listening sister (D. M. N) asked three questions. In her first question, she says: May Your Eminence, the Shaykh, know that I had two brothers, one of whom was thirteen years old and the other fifteen. They fell into a hole and died suffocated under the earth. My question is: Do they bear any religious obligation? Should we seek forgiveness from Allah for them, perform Hajj on their behalf, and perform 'Umrah on their behalf? And are they considered among the martyrs? May Allah reward you with good.

Answer:
May good be wished for them. If they had not reached puberty, then they owe nothing in terms of religious obligation, meaning in terms of sin. They receive the reward for their good deeds, such as prayer, dhikr, recitation, and the like. One of these two had reached fifteen years of age. If he had completed his fifteenth year, he is obligated. If he had not completed it, and it is not known that he grew hair around the private parts, and it is not known that he emitted semen due to desire, then he is not obligated. However, if you perform Hajj on his behalf, or 'Umrah on his behalf, or give charity on his behalf and on behalf of his brother, all of it is beneficial, all of it is useful, and it is good, and praise be to Allah. Yes.

The presenter: May Allah reward you with good and do you good.