If you look at the taxonomic classification there are 7 levels and they are 1. Kingdom; 2. Phylum; 3. Class; 4. Order; 5. Family; 6. Genus and 7. Species.
The taxonomic level phylum includes greatest number of species for a given genus.
Explanation:
plant growth. you can create a hypothesis like "the plant grows better in blue light! "
Sunlight
solar energy
water
