Answer:
Intervention study
Explanation:
An intervention study is a type of controlled clinical trial in which an intervention is applied to a group of people and the outcome is compared to a similar group without the intervention. An example of this type of study is shown in the question above, where a margarine which vegetable ingredients (which is the intervention) will be given to a group of people, so that their blood cholesterol levels are compared to the cholesterol levels of a group of people who didn't use this margarine.
Answer;
D. Products are not proven to increase immune health, but research shows that a healthy lifestyle will benefit your immune system.
Explanation;
A healthy lifestyle helps keep the immune system happy and healthy. Factors such as stress, bad eating habits, lack of sleep, and unhealthy lifestyle habits can weaken the immune system. From research healthy lifestyle is key in boosting the immune system. Products claiming to boost the immune health have not been proven to do so.
Fail or loose focus idk it hard to explain without a picture of the question