An acid is any chemical compound which when dissolved in water gives a solution with a hydrogen ion activity greater than in pure water.2<span>A </span>base<span> is an aqueous substance that can accept hydrogen ions.</span>
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This is so-called Faulting.
In our Earth, we have sections of the crust. When the sections move relative to each other, faulting occurs.
The answer is C. Pheromones are hormones (which are proteinous) produces by individuals of the same species and are a means to send communication signals for social interactions. They signal alarm, food and even sex. Sex pheromones are released by females beetles into the environment to signal their availability for mating. The pheromones are picked up by receptors on the male beetles and this is how they find the females.
