A. Answer the following questions briefly: 1. What is an alloy? How did the discovery of iron help early man?
2. Who invented the steam engine? What was its use?
3. What do you mean by Industrial Revolution? What were its effects?
4. Name any three alternate sources of energy.
5. What is biogas? How is it used?​

Select a real-life situation in which a person may face isolation due to a difficult condition, as gregor does after turning into an insect. you may choose a situation from the list below, or use a different one if your teacher agrees with your choice.psychological conditions: dementia, schizophrenia, depression, or post-traumatic stress disorderphysical conditions: paralysis or severe injury, going blind or becoming deaf, or facing an addictionsocial conditions: being wrongly convicted of a serious crime, or moving to a place where some attribute of the person makes others around the person view him or her with contempt or suspicionwhat condition did you choose to compare with gregor's condition?