The correct option is D Producing flowers
Both monocots and dicots produce flowers.
Monocots differ from dicots in the type of venation, number of cotyledons in the seed and type of root system.
Dicots have reticulate venation whereas monocots have parallel venation.
Dicots have two cotyledons in the seed whereas monocots have a single cotyledon in the seed.
Monocots have a fibrous root system but dicots have a tap root system.