Very much. Just watch th bee movie and it will show you all of the affects.
In addition to the documentary mentioned above they are also responsible for the pollenation of a very large number of plants and flowers, have a minor effect on the population of some even smaller insects, and they make honey which is epic.
Additionally some Ancient greeks thought that because bees made honey,(considered a delicacy worthy of the gods in those days) that they were divine animals.
By pollinating flowers, fruit and vegetables.
Bees are helpful to us by making honey and speading pollenation
runoffs are important to nature because runoffs move water to reach for animals needs and are vertify to be helpful to humans
BEES
they let bees build hives in them
It depends on what you define as helpful. Yes, all bees have a role in maintaining balance in their ecosystems, especially through pollination, but they are not neccesarily "helpful" to humans directly.
Nature. Bees are insects. Birds make nests.
they spread pllen
Bees are important for beeing bees and stinging all of us
they produce honey that we eat
Because animals are nature to us.(eg bees make honey).
Nature is helpful in many ways, trees give us oxygen to breathe, bees pollinate flowers to give us fruit, swallows stop us getting overrun by flies, its way too much to say in one wikianswer! XD