A word about responsibility?

Politicians are accountable to voters.

Politicians should be accountable to voters.

She is my child, and I am responsible for her.

She is my child, and I am responsible for her.

2.[F][(+for)] as a reason

Heavy rain is the reason for the shortage of vegetables.

Heavy rain is the reason for the shortage of vegetables.

Bad weather is the reason for the poor harvest.

Bad weather is the reason for the poor harvest.