You may think it's normal to be awake during the day and sleep at night, but that's not true for all animals, Humans are diurnal, the
scientific term for tending to be up and about during the hours when
the sun is up. Being awake in daytime has some obvious advantages.
It's warm, it's easy to see, and, at least for humans, sunshine provides
much-needed vitamin D and also makes us feel good.
But for many animals, being up at night, or being nocturnal, is a great
arrangement. Small animals who are in danger from predators can
gather food more safely in the dark. And some animals can find their
way around by using senses other than sight - bats, for example, use
their sense of hearing to navigate. In hot climates, it can also be a
good thing to avoid the bright sun and spend the day curled up in a
cozy cave or den.
Which statement best summarizes two central ideas of the text?
A. Predators tend to be diurnal; prey animals tend to be nocturnal.
B. Being diurnal brings some advantages, being nocturnal brings
others.
C. Humans are diurnal; bats are nocturnal.
D. Some animals are adapted to being diurnal; other animals use
senses other than sight.

the speech this question is referring to is president kennedy's special message to the congress on urgent national needs, may 25, 1961

kennedy responds in a very direct and concrete way to those thinking that communism is a positive system:

"yet their aggression is more often concealed than open. they have fired no missiles; and their troops are seldom seen. they send arms, agitators, aid, technicians and propaganda to every troubled area. but where fighting is required, it is usually done by others--by guerrillas striking at night, by assassins striking alone--assassins who have taken the lives of four thousand civil officers in the last twelve months in vietnam alone--by subversives and saboteurs and insurrectionists, who in some cases control whole areas inside of independent nations." (kennedy)

president kennedy presents communism as cowardly, as a hidden and treacherous weapon that strikes from the shadows like thieves, he represents the system as not even being capable of showing and open and overt attack or confrontation. to finish up the response, he expresses that the system attacks even a country's idependence and freedom.

second person

explanation:

note the heavy uses of "you", "your", as well as "he".

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1. list two reasons why fossil fuels should continue to be used as a source of energy in america.

the development of trade during the middle age increased to the change given in the agriculture, which gave money, industry and markets a bigger importance in economy. the agriculture production was more than the consumption, which meant the creation of wider markets out of the areas. besides, with the end of multiple wars, the population increased and new trade routes were created.