Answer:
D. threat; challenge
Explanation:
Anything that causes an organisms stress process to initiate is called a stressor.
Threat is something that can cause us harm or something which we perceive might cause us harm.
A challenge is a threat, if overcome can cause us to grow our personality.
So, a threat is something which we cannot overcome while a challenge is a threat which we perceive can overcome and will be beneficial for us.
Social Darwinism is the theory that B) life consists of competitive struggles in which only the strong survive. This theory applies Darwin's theory of natural selection to the social and political world. Those who supported this idea believe that in the social realm it is the responsibility of individuals to succeed and that those who are strong enough will and those that are not will fail. Those that support this theory did not support government programs to help the poor and other socially beneficial government policies.
Answer:
Some technological choices may have been less successful. Examples are lead pipes, used in the antique and continues to be used in house connections. until recently water and sanitation systems are at need of constant maintenance and rehabilitation. which was already seen in Roman aqueducts. such as calcium carbonate incrustations formed inside, and without constant removal it will stop the water flow. the same as for modern systems they need to be taken care of or else they will not function properly. that is the bigger problem the constant replacement and fixing. A long term debatable issue is what source to use and whether to use ground or surface water. surface water is needed for bigger systems, and smaller systems usually use ground water. this is the current question how far is it economically possible to expand the systems. once these systems are expanded the only thing wrong is being over exposed.
Explanation:
Answer:
The Neolithic (or 'New Stone Age') is a term used for the period in our past when the shift from hunting and gathering wild animals and plants to a farming lifestyle occurred. It was also the time when pottery was first used, and in many regions people also began to live in permanent settlements.
