The right answer is "Different age groups are tested at the same time". This type of research is known as A Cross-Sequential Design. These investigations have a cross-sectional and longitudinal, involves analyzing a group of people of different ages (For example 10, 20, 30 and 40 years) over time (For example, for 40 years), this in order to study human development in a particularly long period of life.
I hope my answer can help you.
The hajj is what muslims must go on at least once in their lifetime, they travel to the city of Mecca on a pilgrimage
With over two million lakes and rivers and 20 per cent of the world’s freshwater, Canada has an incredible abundance of aquatic natural resources. Canadians share a deep historical connection to freshwater; we rely on it for transportation, for resources, for employment, for food and for recreation — swimming, boating, fishing or simply admiring the scenery of a natural lake or wild river.
Unfortunately, many of Canada’s freshwaters are no longer the pristine ecosystems they once were. At CWF, we are working to encourage a better balance between the needs of our society and of the ecosystems that sustain us.
Answer:
Fred Huckleberry (1867-1946) \
Hope I helped
He was born Nov. 27, 1895,
