Answer: The 4 ways human activities affect physical environment negatively is by driving vehicals and that causes Pollution and it harms the environment, persistent pollution problem (trash in the ocean) it harms the animals,oil pollution in the ocean and it harms and they can severely contaminate beaches and sediment, and cause serious harm to marine wildlife, the last thing is litter can also pollute the air.
Explanation:
Most people in central Asia live in
A. Valley’s
Explanation:
20 men can do 1 W in 36 days
=> 20 men can do 1/36 W in 1 day
=> 10 men can do 1/72 W in 1 day.
30 girls can do 1W in 36 days
=> 30 girls can do 1/36 W in 1 day
=> 12 girls can do 1/90 W in 1 day.
Together 10 men and 12 girls can do 1/72 + 1/90 W in 1 day
= 9/360 = 1/40 W in 1 day.
Therefore they need 40 days to do the piece of work.
Answer:
B
Explanation:
the land in greece was very mountainous, making it unsuitable to farm on
