He meant that if they failed then everything that the world has worked so hard for, to advance and become "smarter" than we once were would all be for nothing. We would enter a new Dark Age. The Dark Ages were an extraordinarily difficult period in the story of humanity. It is estimated that 100 million people died at the hands of war, poverty, and plague. But during this time new ideas and ideals were born and much of the groundwork was laid for the world we know today.
Answer:
Explanation:number one is they can't see but number 2 is correct
Answer:The method that one can conceive to get something out of a crevice is by using a bug stick and by getting tweezers to get something small out. The definition of a crevice is a long, tight space often found on the face of a mountain or other geological formation. These crevices can either be large or small but since these locations are hard to reach, these places are really great places for hiding. These are where you can see reptiles, bugs, and even lost climbers. Oftentimes, the word crevice is a natural formation but at the same time this is used to describe any long, narrow space that’s hard to access.
Explanation:
<span>A concept is the way in which a category or class of objects is represented mentally. Concepts allow individuals to discern class membership or non-membership, relate different classes of objects, and provide context for learning new information about classes and class membership. There is wide debate about the way in which categories and classes are mentally represented and defined. The way in which concepts are learned can depend on the age of the learner, whether or not explicit instructions are provided, and the type of category or class the concept represents.</span>