2) The Breeds. The breeds you list are all varieties of the honeybee (A.mellifera) but there are other species grown and used commercially all over the world. Bumblebees (Bombus) are bred commercially and internationally to pollinate greenhouse tomatoes. The Chinese domesticated their own honeybee (Apis cerana) thousands of years ago and these bees pollinate fruit and vegetable crops throughout much of eastern Asia. Blue orchard bees (Osmia) are also kept commercially and some authorities think they do a great job pollinating almonds. It's estimated that 15 - 20 million leaf cutter bees (Megachile rotundata) are produced annually to pollinate alfalfa (primary feed for our cattle and poultry).
3) Anatomy. The actual proboscis (described but not pictured in the photo) is not an airtight sucking device. Your staff confused it with the cibarium (inside the bee's head) which does aid in sucking but the actual proboscis of a honeybee is tipped with a hairy spoon so it works more like a cat's tongue (lapping not sucking).
4) Anatomy. Yes, honeybees do have an electrostatic charge and this picks up pollen when the worker honeybee visits a flower only for nectar. However, most of the pollen they pick up occurs when they actively scrape male flower organs known as anthers. Your photos of the honeybee did not point out the corbiculae (pollen baskets) on the hind legs used specially to haul pellets of pollen foraged actively by a worker.
The Impact On The Farm PP.30-31.
1) This is misleading. Asparagus, broccoli, onion and celery do not require pollination prior to harvest. We would find them distasteful (stringy, bitter or dry) if they were picked after they flowered. These vegetables need bee-pollination to produce next season's supply of commercial seeds that companies then sell to farmers and gardeners. No one eats a bee-pollinated asparagus that has "gone to seed."