The underlined word “who” (line 07) is a/an: 

Questões de assuntos semelhantes

• Marque a alternativa que melhor completa as frases com os pronomes respectivamente corretos. I – I cut ____________ with a pair of scissors. II...
• In the third paragraph, in the phrase “says it is aimed at those” (L.26), the pronoun “it” refers to “Transport for London” ( L.25).
• O pronome it, utilizado na última linha do primeiro parágrafo, na frase for the products it markets, refere-se
• A expressão none of this matters, no segundo parágrafo, refere-se
• It may seem counterintuitive, (l. 5)The pronoun it refers to a certain idea present in the text.This idea is found in the following fragment: