Before we carved pumpkins, the Irish chiseled creepy faces onto turnips. Pumpkins with ghoulish faces and illuminated by candles are a sure sign of the Halloween season. The practice of decorating jack-o'-lanterns originated in Ireland, where large turnips and potatoes served as early canvasses.
Answer:
In ecosystem every organism is dependent on each other .
just like that horse and grass or cow and grass are dependent to each other .
horse and cow eats grass so that there is balanced population of grass .
if there is no horse or cow(or other herbivore) then it effect the population of grass because there is no any one who eat them that's why grass population is go on increasing continuously ....
Explanation:
Answer:

A proper fraction is a fraction whose numerator is smaller than its denominator 3/4, 2/11, and 7/19 are proper fractions
1): it's learned helplessness, -it's really hard to unlearn, and can't really be unlearned by conditioning.
2) the best answer here is social cognitive theory - observation of others is seen as a part of social cognition.
3) Here the correct answer is the following:
B. can develop even if a behavior is only intermittently reinforced. This means that you believe you're lucky on Fridays, even if you're not lucky on every Friday, only on some Fridays.
Answer:
(opportunity cost) A comparative advantage is the ability of a country to produce a particular good or service at a lower opportunity cost than another country.
Explanation:
The ability of producing a product or a service at a reduced cost of production than that of the competitors is referred to be an absolute advantage. The ability of producing a product or a service at low opportunity cost than that of the competitors is referred to be Comparative advantage. When a product is produced in an efficient manner than a competitor which is at a reduced it is an absolute advantage. Comparative advantage means that, instead of producing some other goods at some costs, a particular good can be produced at a lower cost. This is also termed as an opportunity cost.
hope this helped!