The correct option is B. Ecosystems are in danger from all of the following except decreased eutrophication.
What are the effects of eutrophication?
Excessive plant growth, damaging algae blooms, a rise in the frequency of anoxic occurrences, and fish fatalities are all effects of eutrophication.
Thus, Except for decreasing eutrophication, all of the following poses a threat to ecosystems. Eutrophication is one of the principal sources of harm in many freshwaters and coastal marine environments around the world.
Learn more about Eutrophication here:
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Answer:
Quasi experiment
Explanation:
A quasi-experiment is an empirical research design used to estimate the "causal impact" of an intervention on target population without "randomly assigning participants" to treatment and control groups. This research design shares similarities with traditional experiment designs and random control trials.
When unable to manipulate the independent variable, like gender, correlational or quasi-experimental designs are suitable. This involves observing and measuring variables naturally, without interfering. You could gather data on students' math scores, analyze the difference between genders, and adjust for potential confounding variables.
In situations where you're not able to manipulate the independent variable (in this case, gender), observational or correlational research designs are often most appropriate. These designs involve observing and measuring variables as they naturally occur, without any intervention from the researcher. You could use quasi-experimental design which are similar to controlled experiments, but lack the element of random assignment to groups. Or you might take a correlational study, wherein you're measuring the relationship between two variables, in this case, gender and math achievement.
For example, you could gather data on the math scores of a number of male and female students, and then analyze whether there is a statistically significant difference between the two groups. This design will also enable you to factor in potential confounding variables, such as age or socioeconomic status, if necessary.
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b. Burglary
c. Workers' compensation
d. Liability
b. revolutionary militia.
c. terrorist organization.
d. special interest group.