True should be the answer.
You would want this observation to be in an area with a lot of biotic and abiotic factors, so the best place for it is an ecosystem.
Nitrogen Fixation. Good luck :)
<span>The answer is: they are not the right ways to lose weight.
</span><span>All of these methods are not healthy because they don't have enough essencial nutrients, they</span> contain chemicals/ irregular ingredients and makes our metabolism slow down to save energy.
They can make people lose weight because they are cutting drastically their calorie intake but it can't be maintained forever. Most likely people will regain the weight lost after ending this diets.
D) It can only be used in areas with specific kinds of rivers.
