I think the Answer is truly B.
The sence receptors for taste are taste receptors and these receptors are located in oral cavity!
One redo our could be a body of water like a dam as such, and another is something like a retention pond, taking in water
Trophic cascades are powerful indirect interactions that can control entire ecosystems
So, if the birthrate and the death rate are the same, that means that for every person that gets born, one person dies: so the number of people would stay constant. This means that the growth rate is actually 0%.