Answer:
absolute brightness
Explanation:
The observational fact about a cepheid variable star that leads to a measurement of its distance from earth is that its period of variation is directly related to its absolute brightness
I would say D is NOT one of the reasons why life is found only on Earth
The answer is Contour lines
Wind carries heat, moisture, pollutants, and pollen to new areas. Many daily weather patterns depend on wind. A coastal region, for instance, undergoes changes in wind direction daily. The sun heats the land more quickly than the water.
Imagine that the arable land is scarce then people will compete for land in competition will be big this means that it is more likely to be able to find smaller pieces of land for it is likely that the size of the House and farms will be small
