<span>The ecological pyramid is the smallest at the top beacuse there is ten percent loss of energy, in the form of food, at each trophic level, and the number of organisms of the top most level are the fewest. </span>
Answer:
This theory was developed in 1929 by the American demographer Eric Lofstedt
Explanation:
- Demographic transition s models that show how the population of any country moves from traditional to modern society i.e shift from high birth rate to low birth rate with improvement ion stands of living.
<u>The transition has five stages/phases
</u>
First Stage: A stable or slow increase in population. i.e pre-industrial society
Second Stage: Very rapid increase in population. i.e Agricultural revolution
Third Stage: Increase slows down. i.e Urbanization stage.
Fourth Stage: Falling and then a stable population. i.e Disease control
Fifth Stage: Stable or slow increase.
- Demographers created this transitional model keeping in mind the lifestyle of the man at the time of industrial societies keeping in mind the factors like income, marriage, morality, age and sex ratio, and dependent and independent variable like the birth and death rates.
- Various nations have different demographic transitions and shift occur when societies advances and moves up the ladder of growth. LInking society fertility and economic development.
Answer:
and i gained 4 pound from eating it
Answer: During the day, valley air heats rapidly and rises upslope. At night, mountain air cools quicker and moves downslope into the valley.
Explanation:
The correct statement about Mountain-Valley breezes is that during the day, the valley air heats rapidly and then rises upslope while at night, mountain air cools quicker and then moves downslope into the valley.
During the day, when the valley floor warms, it should be noted that the warm air will then rise up to the slopes of the mountains that are around its surrounding which brings about a valley breeze.
Then during the night, the denser cool air will then slides downward the slopes and then settle in the valley which then gives the mountain breeze.
Therefore, the correct option is A.
