What??? I need more details!!!
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.
Answer:
Esperanza admires Marin because "she is older and knows lots of things". Marin is worldly, and flaunts a sense of sexuality that the younger girls are only beginning to discover. Marin also has dreams of escaping Mango Street, and appears to the others to have options which will allow her to do that.
