I would say B.
A, umm, don't crash trains, that's bad.
C, Lillian is wondering how fast a train can go, not at what curve will it fall.
D, Lillian isn't wondering about the size of the trains, just the speed.
The endosymbiosis explains how eukaryotic cells may have evolved from prokaryotic cells.
Because one of them dies and another one doesn’t
Answer:
1) sound is encoded on a digital recording as an electrical signal.
2) the digital recording plays the sound as an electrical signal.
3) the electric signal moves through a voice coil
4) The voice coil produces a magnetic field.
5) changing the magnetic field pushes and pulls on the diaphragm.
Answer:
You may not think that Fruit Flies pose a health risk but they are insects and all insects pose a health risk if they hang around long enough.
Explanation: