I believe it’s A, i could be wrong tho 3
The reason why the snails are dead because the snails lack oxygen for it is a model of closed ecosystem. Another reason to this is that they lack abiotic factors that they need in surviving or as they live for the place that they are living lacks a lot and are not enough for them to last or survive. Lastly, the water could have not been a contributor for them to live for they may not be able to live in a water environment and could only dwell in land.
The answer should be:
Angle Of incidence is equal to angle of reflection.
No because the bacteria in there mouth is going on the bottle u drink from
