Final answer:
Gaius Gracchus tried to improve the life of the lower classes by proposing new colonies for landless farmers, providing free grain, and advocating for public works projects for job creation.
Step-by-step explanation:
Gaius Gracchus tried to improve the life of the lower classes in several ways.
One of the ways was by proposing to establish new colonies to give land to poor Roman farmers.
This measure aimed to address the issue of land concentration and provide opportunities for the landless.
Additionally, Gaius provided free grain for the poor and called for public works projects to create jobs and improve the economic conditions of the working class.