Why does نَوَّرَ الشَّجَرُ exemplify ṣayrūrah rather than causing another thing to change?

Thirteen Semantic Properties of Form II (Tafʿīl): From Causation and Multiplicity to Independent Meanings

• Because shajar is an absolute object.
• Because lan precedes the verb.
• Because the tree itself blossomed, rather than transforming another object.
• Because an interrogative hamzah occurs.