Which ecosystem has been least changed by humans -forest, grasslands, or desserts? why do you think so

Which of the following describes what rocks usually are composed of ,

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

In saudi arabia, voting rights are limited to