The US is concerned about innocent lives being at risk in this conflict, and involved in continual efforts to ensure the war in Yemen is prosecuted according the laws of land warfare and that civilian casualties are minimized. But the Houthis bear responsibility for this as well since they regularly commit war crimes by conducting military operations from within civilian zones. For example, if they fire missiles from areas populated by civilians they are responsible if an air strike to destroy the launcher happens to cause collateral damage.
The US is concerned about innocent lives being at risk and involved in continual efforts to ensure the war is prosecuted according the laws of land warfare and that civilian casualties are minimized. But the Houthis bear responsibility for this as well since they regularly commit war crimes by conducting military operations from within civilian zones