Why does the Northern Hemisphere experience spring in March, while the Southern Hemisphere experiences fall?
The Sun is directly overhead in the Northern Hemisphere in March.
The Southern Hemisphere receives more direct rays from the Sun in March.
The Northern and Southern Hemispheres get the same amount of energy from the Sun in March.
The Northern Hemisphere receives more daylight hours than the Southern Hemisphere in March.

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

the answer would be   10%