Groundwater is recharged naturally by rain and snow melt , hope this helps :)
I believe the sunbird would benefit the plant because it would pollinate them. Going from flower to flower, pollen would get stuck on it's feathers and it would pollinate other flowers, like a bee.
Heat is then the by-product of the light energy from the Sun flowing through the biosphere. Organisms are inevitably dependent on sunlight to perform essential biological processes in order to sustain life. In the absence of this energy, all the organisms on Earth would die.
When cells start to swell up with water, Osmosis takes place.
Birds have great vision and can see throughout night and day