Imagine you are standing on one side of a wall and there is a light source on the other side. which best describes why the light would become brighter as you approached the open door in the wall?
a) absorption
b) diffraction
c) reflection
d) refraction

B, diffraction

I might be wrong but I just took a test with this question and the majority of people put B.

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.