A research company uses a device to record the viewing habits of about 12 comma 50012,500 households, and the data collected over the next 2 yearsover the next 2 years will be used to determinenbsp whether nbsp whether the proportion of households tuned to a particular sportssports programnbsp decreases.

cross-sectional study

Explanation:

A cross-sectional study is an observational research that has to do with data analysis of variables or sane set of variable obtained at a particular point of time (a snap shot)across a sample population. It is also called cross-sectional analysis, transverse study or prevalence study.

In this study type, the variable is said to be constant. It can either be a descriptive (to show the frequency and distribution of the study topic in a particular area) cross-sectional study or an anakytical cross-sectional study (to show the relationship between two related or unrelated variables).

As in this case study, if a significant amount of the population view a particular sport program more than the others, the researcher can conduct further studies to understand the reason behind the variation in populations that viewed a particular sport program – like a longitudinal study.  

In a cross-sectional study, to determine the prevalence, multiple parameters are estimated simultaneously – questions, observations, and answers. Prevalence = amount of cases at a certain period in time / population of people at that certain period.

The cross-sectional studies is swift to perform, variblels are retrieve once, help determine different outcomes with the prevalence value too, can be used for descriptive analysis and to promote further research.

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation: