hi

iam getting the below error   please suggest me.

thanks

Error: Compile Error: Invalid bind expression type of SOBJECT:Account for column of type Id at line 5 column 56

trigger score on Opportunity (after insert) {

for(Opportunity op:trigger.new)
{
account acc=[select id,score__c from account where id=:op.Account];
acc.score+=2;
update acc;
}
}