I believe it would be the reptile kingdom!
1. scales & cone parts
2. Pistil and stamen & flower parts
3. egg & female cell
4. mitosis & cell division
5. hyphae & fungi parts
6. vegetative production & leaf and spore case
7. Sperm & make cell
8.
They reproduce by pollination.
I believe it’s the sun
As the sun gives nutrients to the plant
Plant gets satin by animal
Animal gets eaten by animal and so on and the nutrients would be passed on