Answer:
Humans were nomads. Their wandering was mainly in search of food and shelter. When they found that certain places had an abundance of food – plant food or animals for hunting, they stayed on. They observed the plants, their growth and when these food sources diminished, they grew plants themselves, from the seeds they collected. This is how agriculture came about.
When humans stopped their nomadic ways and stayed together, it paved the way for formation of the human social structure. Hierarchies were established in due course.
Answer:
Approximately 22,000 metric tonnes of fish per year
Explanation:
From the graph,
Rate of decline :
(metric tonnes of fish in 1965 - metric tonnes of fish in 1995) / range of years
(700,000 - 40,000)metric tonnes ÷ (1995 - 1965)
660,000 metric tonnes ÷ 30 years
660,000 / 30
= 22,000 metric tonnes per year
Approximately 22,000 metric tonnes of fish per year
<span>The percentage of the Department of Transportation's budget is for winter road maintenance is 20%..State DOTs (Department of Transportation) in snowy regions spend more of their budget on clearing roads during the winter season.The high percentage of the budget is necessary to reduce accidents due to loss of friction between roads and automobile tires, and to repair damage to roads. Even with this high spending rate, many accidents occur in the winter because of poor visibility and loss of traction due to slipping of automobiles.</span>
