3) Since Moses and Elijah were present at the Transfiguration, this is a good example of divination because Jesus conjures up the dead to show us how to honor our deceased loved ones.
The answer is: False:
The Transfiguration is not an ancient example of a séance. In fact, the Church has always condemned divination. “All forms of divination are to be rejected: recourse to Satan or demons, conjuring up the dead or other practices falsely supposed to “unveil” the future. Consulting horoscopes, astrology, palm reading, interpretation of omens and lots, the phenomena of clairvoyance, and recourse to mediums all conceal a desire for power over time, history, and, in the last analysis, other human beings, as well as a wish to conciliate hidden powers. They contradict the honor, respect, and loving fear that we owe to God alone” (CCC ¶2116).
There are many Biblical texts, such as Deut. 18:10-11, Isaiah 19:3, and 1 Samuel 28:3-19, that condemn necromancy, which is "the attempt to initiate communication with the dead... So grave was the crime of necromancy, and so pernicious its consequences, that God actually prescribed the death penalty for it (see Lv 20:6, 27)" (from page E-1 of The New Catholic Answer Bible – NAB, Fireside Catholic Publishing, 2005).
On the other hand, the historic Christian practice of praying to the saints is encouraged by the Church. This humble practice of asking our departed brothers and sisters in Christ – the saints – for their intercession by praying to God on our behalf dates to the earliest days of Christianity. “In addition to our prayers directly to God and Jesus (which are absolutely essential to the Christian life), there are abundant reasons to ask our fellow Christians in heaven to pray for us.” The Scriptures indicate that they are aware of our prayers, that they intercede for us, and that their prayers are effective. Many passages in Scripture, such as Ps. 103:20-21, Ps. 148:1-2, and Rev. 5:8, direct us to invoke those in Heaven and ask them to pray with us. (adapted from Catholic Answers article, “Praying to the Saints”: https://www.catholic.com/tract/praying-to-the-saints).