Answer:
(2 , 4)
Explanation:
use formula of reflection over y axis
formula is
(x , y ) = (-x , y)
(-2 , 4) = (2 , 4)
The following are the achievements of the Olmec
civilization:
1.
Water Drainage
-
This civilization was able to construct an
extensive drainage system that is made up of conduits. This was discovered by
the archaeologists in the town of San Lorenzo, the largest city of Olmec
cities. These was carved into a U type shape and covered by capstones. This was
believed to be used as aqueduct to provide water throughout the cities.
2.
Calendar system
-
It was discovered that Olmecs have their own
calendar system. They are using shells to represent numbers in their calendar which
starts with zero. This is one of the first uses of zero as starting point of a
number.
3.
Ulama
-
This is a game of the Olmecs with the objective
of knocking the ball through the hole with the use of hips. The sap of a rubber
tree was utilized to produce balls that was used before.
4.
Writing system
-
They are usually credited as one of those
civilizations to be the first to have their own writing system in America. Their
writing is mostly symbols rather than letter representation.
5.
Compass
-
They are the one to first create compass that
existed in America with the basic understanding of gravity and magnetism.
Answer:
Food security comprises of availability, access, utility and stabilization.
Explanation:
Food security is a measure to check the availability of food to individuals and their affordability being a prime factor. In other terms, it means that everyone has a sufficient amount of health food i.e it can be measured by calorie intake per person to lead healthy lives.
Food availability in developing countries is cause and an effect of several factors like poverty, status, political stability and infrastructure etc. Most of developing countries in the world have an undernourished or are malnourished population . Mostly in the African countries and the Asian countries like Afghanistan, Domenico republic of congo and Mexico which is dealing with acute food insecurity. As compared to developed countries like in Australia and North America have low food insecurity but they still face global water crisis, land degradation and impact of climate change along with food wastages.
Programs that help developing countries reach food security goals.
Use of genetically modified crops.
Boosting agricultural science and giving agricultural insurance.
Making food security gender-equal.
Reducing land-use changes.
