A stratified sample is obtained by dividing the population into homogeneous groups and randomly selecting individuals from each group.
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What do you understand by stratified sampling?</h3>
In stratified sampling, respondents are divided into groupings known as strata based on shared traits (e.g., race, gender, educational attainment). A different probability sampling technique is used to randomly sample each subgroup once it has been divided. To complete the sampling process, stratified sampling is a form of sampling technique in which the entire population is divided into smaller groups or strata. The population data's common traits serve as the foundation for the stratum. The ability to obtain a sample population that most accurately represents the overall population being investigated while ensuring that each subgroup of interest is represented makes stratified random sampling one popular technique employed by researchers. However, there are certain drawbacks to this study approach.
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Answer:
Humans participate in 1 and 3, so the answer is C. We burn fossil fuels and use our respiratory system to produce carbon. We do not, however, go through photosynthesis like plants.
Answer;
Location of pain is Forehead
Location of stimuli is in the mouth.
Explanation;
Brain freeze is a type of referred pain because its a pain that actually comes from the cold refreshment in the mouth but the pain is felt in the forehead. The pain happen when one eats an icecream or gulp something ice cold too quickly. It is a short term headache, and occurs when something extremely cold touches the upper-palate.