Final answer:
The texture used by Mendelssohn in his compositions typically includes either a rich and dense homophonic texture or an intricate polyphonic texture, aligning with Romantic period's expressive power and the transition from modal to tonal systems.
Step-by-step explanation:
The texture Mendelssohn employs at the end of his compositions can vary, but if we are to describe a generic one as mentioned in the student's options, it would be a homophonic texture or a polyphonic texture. In a homophonic texture, one main melody is accompanied by chords, creating a sound that is rich and dense. Polyphony, however, describes a texture where multiple independent melodies are intertwined. This was a notable change from the Middle Ages to the Renaissance period and is characterized by the increase of independent voices and the transition from a modal to a tonal system. Mendelssohn, being a Romantic composer, would have likely used these textures in expressively powerful ways, as Romantic music emphasized the drama of human emotions and an intentional challenge of musical expectations.