The vegetation in most environments is crucial as a food source for many animals in the area. Without it, many animals may starve, thus setting on a chain reaction of animal displacement.
The answer to the question is letter A. perihelion.
>The perihelion<span> is the point in the </span>orbit<span> of a </span>planet<span>,or a body</span><span> where it is nearest to its point of orbit, generally a star. It's the opposite of </span>aphelion<span>-- the point in the orbit where the celestial body is farthest from its point of orbit.
>></span>The perihelion and aphelion are the nearest and farthest points <span>of a body's direct </span>orbit<span> around the </span>Sun<span>.</span>
The style is the long tube that attaches the stigma to the ovary. Sperm from the pollen will travel down this tube to the ovules. The ovules, or eggs, are stored in the ovary until they are fertilized. Plants can only fertilize eggs of the same species.
The answer is c. they live in conditions similar to those likely to be found on other planets.