Which is a model of feeding relationships? 1. Protein building

2. Food map

3. Food web

4. Sugar molecules

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

Answer:   d.  carbon dioxide.

Ithink b not to sure hope that : )