Can you me with this crossword puzzle! i dont understand how to do this! me!

The health, management and conservation of biodiversity, is a challenge facing ecosystems worldwide. the major factors that affect the health and function of the great barrier reef are climate change and pollution. which question investigates the effects of a biotic factor on the reef ecosystem?

Where is energy trapped inside the organelle chlorophyll

Which element provides strength to the exoskeleton of clams and oysters