do presentation about the cross-sectional study (power point)

7 slides and last 8th slide is the refrences 

introduction

definition 

advateges and disadvateges 

features 

how power this study in the hirarchy of other study design like ecological and case control and so on, 

the deffrences between this study and other studeis as mentioned in the hirerchy study design with short an examples 

this study use for what and what the outcomes 

the an example