The changing appearance of the Moon during the lunar cycle is a result of changes in - a the amount of light the Moon emits. b the shadows Earth casts on the Moon. c the amount of sunlight that hits the Moon’s surface. d relative positions of Earth, the Moon and the Sun.

D. relative positions of the earth, moon, and sun.

Explanation:

whether or not the moon is full or is crescent shaped depends on whether or not the earth is casting a shadow on it, or for example, when a solar eclipse happens, the moon goes directly in front of the sun from a humans perspective.

the answer is a) cell division.

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the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.