Which atmospheric layer is where earth's northern and southern lights occur?

Thermosphere is the atmospheric layer where Earth's northern and southern lights occur.

Explanation:

These are the beautiful lights of different colors appear in the evening sky (generally at higher altitudes).  

These occur in thermosphere.

The solar wind (a hot flux of particles) are moved away from sun by the plasma. These solar wind particles may get strike on the thermosphere of earth and thus get in contact with magnetic field of earth which appears like bright colored light.

pie chart because it is in percents ( % )

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.