Ahealth psychologist wants to study whether a diet of fruits and vegetables is healthier than a diet of meat.
1. place in order the steps of the scientific method he needs to follow.

Predominantly Yes

Explanation: Predominantly yes fruits and vegetables are good for our nutrition but the science of nutrition also tells us that animals and their edible materials are some important source of nutrition for us , so it creates a dilemma.

What so ever animals are not making the base of our food pyramid so a vegetables and fruits diet with all nuts legumes etc, is more healthy and can be sustained for a longer period.

A scientific method to approach this answer is as following:

1) Highlight linkages of our diet likings,cultural and community attitude towards specific diet.

2) Keeping in mind religious beliefs and type of area where you live.

3) What and how a change of nutrition will effect ?

4)The approach should deliver a detailed perspective of the type of nutrition and its outcomes interms of health and illness by showing results.

5) Analysis and Results

For example in India where there are Muslims and Hindus together. Most of the hindus are vegetarians, and muslims are not.

Applying our scientific method , we need to consider their likings ,religious belief ,cultural values about certain food.

After that , we have to sort out what is available in the country easily and is affordable for the particulars.

Then comes the experimentation of that food and reaction of people towards that change .Like if we suggest a Muslim never to eat meat will he accept that ? What will be his reaction?

Following is the solution to dillema , through measuring the outcomes of that particular food ,considering its health impacts and disease prevention . Like it is already proved that vegitables and fruits are more healthier than meat , as they have very little chances of causing ischemic heart disease as compared to meat. Plants can even help us poop easily with their fibre content and much more .

So finally we can conclude that vegetables and fruits weigh over meat ,as they make base of food chain ,they are source of fibre , they are lesser cause of disease, easy to digest .

Most of all we can live a good life without taking the risk of meat .