I'm not sure but probably A.
Green revolution refers to the drastic increase in food production during 1960s in the developing countries.
Two intended outcomes: 1. HYV seeds enhance the productivity level. 2. Use of modern machinaries promote huge yield per unit of land.
Two unintended outcomes: 1. Loss of soil fertility. 2. Increase of salinity in under ground water.
Explanation:
In 1960s green revolution brought a drastic change in India's agricultural pattern. Yield per unit of land increase rapidly. It introduced the use of modern machineries, pesticide & weedicides in the crop land, HYV (High yielding variety) seeds etc.
Besides due to green revolution pollution level rise up, salinity level in the ground water increases and even the soil fertility level decreases. Huge and frequent use of pesticides and insecticides promotes soil erosion and crop rotation, multiple cropping system reduces soil fertility level.
Answer:
1. Missionary work
2. The Avars turned against the Byzantines after initially helping them fight the Slavs.
Explanation:
1. Cyril and Methodius were brothers and were born in the 9th century, amidst the Constantine Empire. they became great missionaries, being recognized throughout the empire, mainly because of their strong teachings, since they received a quality education in Constantinople, masterfully mastering concepts such as philosophy, grammar, rhetoric, music, arithmetic, geography and astronomy, in addition to Greek and Latin.
2. The Avars were allies of the Byzantines during the battles against the Slavs, being very influential for the victory of the Byzantines and the strengthening of the empire, however after the change of rulers and in the midst of an economic crisis, they decided to turn against the Byzantines and collect very high fees that contributed to the overthrow of the empire.
William the conqueror is from England.
