Can someone me with this multiple choice question? (biology)

67. The answer is A. Predator Prey relationships have actually been found to be the most beneficial in ecosystems with high biodiversity. Predators and prey keep each other from becoming too over or underpopulated because when prey population is lacking, predators population decreases as well due to starvation. When predator population is high, prey population decreases and then the cycle continues, more predators die from starvation.
68. The answer is H. It's actually very interesting that cellular respiration and photosynthesis are almost opposite chemical equations. Photosynthesis takes in what cellular respiration removes. They even each other out.

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the

Characteristic expected of mineral from lava at earth's surface

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.