Which are not the abundant elements in body

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs