Here's why:

* Plants have an alternation of generations: This means they have two distinct multicellular stages in their life cycle:

* Gametophyte: This stage produces gametes (sperm and egg) through mitosis.

* Sporophyte: This stage produces spores through meiosis.

* Animals only have a gametophyte stage: Animals reproduce sexually, directly producing gametes that fuse to form a zygote, which develops into a new individual. They do not have a separate sporophyte stage.

Let me know if you'd like more details about plant life cycles!