What you need to do is take one of the 3 Investigation samples and list it next to "My topic."
Then you need to find a source for your selected topic and follow the list in the first note card. 
Usually the more information a source has about the author, and the publication, makes it more reliable. 
Once you have that down, you need to provide the 2-3 sentences explaining why you think your selected source is valid and reliable enough to be used in a scientific research paper. You might google sources used in scientific research papers to get an idea.
If you can find sources with authors that have well known names or people who know a lot over your specific topic, then its more trustworthy. 
For the next note card, do the same thing, but find another source. All your note cards will be over your one selected investigation sample. 
So for instance, if you selected Electromagnet, then each note card will have different sources that mention anything having to do with your topic Electromagnet. 
Hope this helps :)
 
        
             
        
        
        
They are called essential because unlike the other ten unessential ones, they cannot be produced in our bodies. They must be obtained in our diet.
        
                    
             
        
        
        
The provided question is incomplete as it lacks the appropriate options that are given as follows:
1. satisfaction with prior methods
2. preference of a sex partner
3. breast or bottle-feeding plan
4. desire for another child in 2 years
Answer:
The correct answer is option 3. breast or bottle-feeding plan
Explanation:
Birth control plans are influences evidently after the first few months of childbirth as breastfeeding reduces the chances greatly of pregnancy by preventing essential process for the pregnancy such as delaying menstruation and ovulation.
This phenomenon is called lactational Amenorrhea which means lack of periods or menstruation. The maternal milk supply must be considered before initiation any of the birth control methods.
Thus, the correct answer - option 3.
 
        
             
        
        
        
Answer:
The major cause of negative human treatment of our aquatic biomes include pollution and overfishing. It can however be slowed down by less dependence of aquatic animals for food in order to preserve the aquatic biomes. 
Advocacy should be done also to sensitize people about the effects of pollution and overfishing in water bodies. Pushing for the enforcement of rules protecting the aquatic biomes from pollution should also be taken note of to improve the conditions of the biome. 
 
        
                    
             
        
        
        
I belive the answer is all of the above