Pls! what would a good thesis statement be for a speech about tchaikovsky's life with the three main points of his early life, his adult life, and his death and legacy. (it's to inform btw) (or at least an idea of how i can form it all together)

You should map out what you are going to write about in your body paragraphs (pre-writing, outline, four-square).  What are the main points in each paragraph that could help you to form the statement?  Once you have that, it should make writing the thesis statement a bit easier.  If this is just a general overview, you could write something like, "Tchaikovsky's composition was shaped by many events that occurred early in life, during his adult life, and long after he passed away."  Again, it would largely depend on what you want your reader to know about the paragraphs they are about to read.

a and b are the correct answer to what your looking fior