Question

how did Gautam Buddha teach kisagotami about the truth of death​

Answer 1

Answer: he made her do something which resulted in her realising that all that is born must die. it converted her to buddhism.

Explanation: kisagotami's son passed away. she brought the child to buddha begging him to bring it back to life. he asked her to get a few mustard seeds from any house nearby which has not experienced death. naturally every house had had a death and kisagotami realised that life is a cycle which cannot be stopped.