What is the word for this definition? when an elements has more then one type each with the same number of protons but a different number of neutrons.

a. radioactive decay
b. half life
c. isotopes
d. daughter atoms

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