The changing appearance of the Moon during the lunar cycle is a result of changes in -the amount of light the Moon emits.

the shadows Earth casts on the Moon.

the amount of sunlight that hits the Moon’s surface.

relative positions of Earth, the Moon and the Sun.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

can you give me more to work here with plzs and you

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

did you fail the test? xd