A( ) is an enormous mass of moving ice. they form in areas that are so cold that snow stays on the ground year around. because glaciers are so massive, ( ) cause them to flow slowly. fill in the blank

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

i just learnt this recently but i need to look through my notes again