I am really confused about the usage of livelihood and livelihoods in below sentences: "The falling orders for new ships mean that many shipyard workers are likely to lose their livelihood."
"Many ship workers could lose their livelihoods because of falling orders for new ships."
"They earn their livelihood from farming."
I came accross the above example sentences on Cambridge web dictionary, and I am left confused as to how livelihood could take a singular form when used with a plural noun/pronoun. I guess, in the 1st example, it's related to the shared experience of shipyard workers making ships and in the 2nd example, it's about seperate experiences of all?
Please clear my confusion.
Thanks in advance.