In the context of the input sentence, determine the relationship between 'Direct Line' and 'Insurance'.
Options: legal form, director/manager, product/material produced, brand

Admiral Group became FTSE 100 leader with a 65p, or 4.5pc, gain to £15.18, RSA Insurance rose 2.2pc to 440.2p, Direct Line advanced 0.7pc to 359.1p and mid-cap insurer Esure climbed 1.9pc to 269.3p.
product/material produced