Answer:
the colour change
Explanation:
because experimental group refers to the things that are exposed to or get affected by the independent variable
The answer is b - high diversity and food.
Having a high starting diversity is an absolute prerequisite for a certain area to even start having a lot of different organisms living in the same spot. The other prerequisite is having a lot of food. This enables the nourishment of big numbers of different species which enable high biodiversity.
Hey there!
The answer is convection.
Hope this helped, have a great day :)
i think its 2 or 3 hope this helps you