Apex in get picklist values and Dynamic Query

Get picklist values

public void getPicklistValues(){
     Schema.DescribeFieldResult fieldResult = Contact.Level__c.getDescribe();
     List ple = fieldResult.getPicklistValues();
     for( Schema.PicklistEntry pv : ple){
         System.debug(pv.getLabel() +'::'+ pv.getValue());
     }
}

Dynamic Query on all fields

public void getAllFields(Id LeadId){
      List fieldNames = new List();
      fieldNames.addAll(Schema.getGlobalDescribe().get('Lead').getDescribe().fields.getMap().KeySet());
      String queryStr = 'SELECT ';
      queryStr += String.Join(fieldNames, ',');
      queryStr += ' FROM Lead';
      queryStr += ' WHERE id =: LeadId LIMIT 1';
        
      Lead LdObj = Database.query(queryStr);
}