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.

Option D, resource management act

Explanation:

In 1991, resource management act was passed in New Zealand, It is the main government legislative document which is referred for formulation of regulation for conservation of environment and natural resources

There are total thirteen regulations with in this legislative which broadly talks about  

-Mandatory approvals from authorities for any activity affecting environment

-Approvals from authority to conserve the resources.

-Set of procedure

-Details of form, fees and laws

-Environmental standards for soil, water, air protection and usage

hence, option D is correct.