Question 19 (1 point) What is proximity?
character positions that are fixed, i. e. standing, sitting, lying down

the relative size of the parts to the whole

how near or far the parts of a whole are to each other

moving from one place to another

Function tipcalculate (slider, bill){  var tip = document.getelementbyid('tipamount');   var slideval = document.getelementbyid('slideval');   var bill = document.getelementbyid(bill).value;   var prcnt = slider * .01;       if (bill == null || bill == '') {      tip.innerhtml = ' enter an amount';       return false;   }  if(isnan(bill)) {      tip.innerhtml = ' enter a number';       return false;   }  if(bill > = 0){      tip.innerhtml = '$' + (bill * prcnt) .tofixed(2);   slideval.innerhtml = slider + '%';   }}

Answertransparent interface

Lymphocytes must recognize antigen and respond to another signal generated by microbial infection to become activated.