The stranger's interaction with Elisa at her garden is different from Henry's interaction with her at her garden. The stranger's interaction with Elisa was a bit awkward since they were not introduced formally and Elisa was a bit professional as she entertains the stranger. On the other hand, Elisa was comfortable with Henry since they have been friends for a while already.
Simple topic of a text, themes can be divided into two categories: a works thematic concept is what readers think, a thematic statement is what the work says about the subject
Is it 4000 psi, 3500psi and 3000psi