The answer to this question is <span>object permanence.
</span><span>object permanence refers to a mental understanding that an object is still stays in that place eventhough we stop observing it.
The ability for infants to understand the concept of object permanence started to develop when the infants enter the age of 4-7 months old.</span>
a because they are taking away peoples jobs
To blaze is to find and mark new trails.
High School Studies. Engineering school<span> admission requirements typically include a high school diploma with a full menu of </span>math<span> and </span>science<span> courses, plus humanities and </span>computer studies. High school preparation should including geometry<span>, </span>trigonometry<span>, </span>algebra<span> and </span>calculus<span>, plus </span>physics<span>, </span>chemistry<span> and </span><span>biology.</span>