What is meant by the word "fire" that appeared in Surahs Taha and Al-Qasas, and by the word "tree" that appeared in the same verses and in Surah An-Nur?

The fire that Moses (peace be upon him) saw was a great light or the light of the Lord of the Worlds, and it was not a real fire. Moses thought it was fire because he saw it blazing in a green tree that only increased in greenery and freshness. The tree was a green acacia, or a wild jujube, or a bramble, or a nabk tree. As for the tree mentioned in Surat An-Nur, it is the olive tree, and it was called blessed due to the abundance of its goodness and benefit, and its oil is among the purest and brightest of oils.