I would say the last one. Yes, the coral reef in the south is being threaten but, it’s not the only one. Many other reefs are being threatened. Why? To find the problem to this reef you need to find the problems of other reefs and compare the data. Which ever the most problem cause you get rid of that first.
The endocrine system through the use of hormones
Cell is highly concentrated compared to blood
Observation the action or process of observing something or someone carefully or in order to gain information:
It codes for all the processes within the cells and contains the DNA.
