The avocado (Persea americana), a tree likely originating from south-central Mexico, is classified as a member of the flowering plant family Lauraceae. The plant's fruit also called an avocado (or avocado pear or alligator pear), is botanically a large berry containing a single large seed. Avocado trees are partially self-pollinating and are often propagated through grafting to maintain predictable fruit quality and quantity. The fruit of domestic varieties has buttery flesh when ripe. Depending on the variety, avocados have green, brown, purplish, or black skin when ripe and may be pear-shaped, egg-shaped, or spherical. The avocado fruit is a climacteric, single-seeded berry due to the imperceptible endocarp covering the seed rather than a drupe. The pear-shaped fruit is usually 7–20 cm long, weighs between 100 and 1,000 g, and has a large central seed, 5–6.4 cm long.
 

Fruits III

In botany, a fruit is a seed-bearing structure in flowering plants formed from the ovary after flowering.

Fruits are how flowering plants disseminate their seeds. Edible fruits, in particular, have long propagated using the movements of humans and animals in a symbiotic relationship that is the means for seed dispersal for the one group and nutrition for the other; in fact, humans and many animals have become dependent on fruits as a source of food.