Answer:
Summary. Stars exist in a range of colors: red, orange, yellow, green, white and blue with red being the coolest and blue being the hottest. A star's color indicates it's temperature, composition and relative distance from earth.Explanation:

Last option: Preserve an ecosystem

• The establishment of a bird reservation is a way to preserve an ecosystem because reservation provides suitable environment to organism. A healthy ecosystem means large number of biodiversity.
Answer:
light energy
Explanation:
Plants take in sunlight given off by the sun to make food during photosynthesis
<span>amylase catalyzes the reaction; glucose is the product</span>
Answer:
Demand for avocados would increase, causing prices to increase.
Explanation:
If avocados are proven to lower the risk of diseases, more people would want to buy them, meaning demand would increase.
When demand increases, people would be willing to pay more for that item, meaning price would increase.
Therefore, the answer is the second option: demand for avocados would increase, causing prices to increase.