While sketching, a flag shown in the color indicates that solidworks is going to automatically add a geometric relation, whereas a flag shown in the color is just for reference?

While sketching, a flag shown in the color Yellow indicates that Solidworks is going to automatically add a geometric relation, whereas a flag shown in the color Green is just for reference (a geometric relation has been added).  

france

hope this !

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.