D (it was produced by cyanobacteria)!!!
Escape velocity is the velocity an object needs to escape the gravitational influence of a body if it is in free fall, i.e. no force other than gravity acts on it. Your rocket is not in free fall since it is using its thruster to maintain a constant velocity so the notion of "escape velocity" does not apply to it.
I think it’s mechanical waves..
D) does the growth of human settlements affect where tigers can live?
