Question

Why might a lysosome fuse with or link up with a food vacuole

Answer 1

Vacuoles store things, so it would make sense that food vacuoles store food. Lysosomes digest things into smaller usable materials (or destroy them) so lysosomes will attach to food vacuoles so they can efficiently digest food. The vacuole to store the food waiting to be digested by the lysosome. Hope this helped :)