These are the arrival times from the earliest to the latest one:
e. Le train de Lyon arrive à quatorze heures quinze.
c. Le train de Nice arrive à seize heures quarante-deux.
f. Le train de Strasbourg arrive à dix-sept heures cinquante.
b. Le train de Bordeaux arrive à dix-neuf heures dix.
h. Le train de Toulouse arrive à vingt heures trente-cinq.
d. Le train d’Aix-en-Provence arrive à vingt-deux heures vingt.
g. Le train de Nantes arrive à onze heures quarante-cinq.
a. Le train de Rennes arrive à douze heures trente.
To complete this exercise, you have to identify what is the time each French sentence presents, and then order them from the earliest to the latest one.
I was able to find the complete instructions for the exercise online.
To identify what is the time, you should pay attention to the last part of each French sentence.
