They have to wait for the right weather to dig a grave. If it looks asthough it is about to rain then they will know that all of the soil will fall inside the grave.
Answer: Because sand dunes protect inland areas from swells, tides, and winds, they must be protected and defended like national treasures. A strong and healthy beach dune is a powerful antidote against coastal erosion. The ocean and the wind can have an unpredictable, destructive force on coastal regions.
A. Hawaii
I hope it helps!!
The three methods of determining latitudes are:
Celestial navigation - is the use of a celestial body such as the sun, the moon or a star at sight to know your location.
Sextant - is an instrument for navigation the uses two visible objects. The angle between the horizon and a celestial body will determine your location.
Octant - this is also an instrument used for navigation for calculation of angles.
