title: Way to skip reCAPTCHA images challenge
body: <p>I am implementing reCAPTCHA on one of my websites and I have successfully implemented it. It is working fine. Sometime the reCAPTCHA gets completed only by clicking the "I'm not a Robot" but sometimes it shows the images grid to select the correct images and complete the captcha. </p>
  
  <p>I was just wondering if this possible or not. Can we disable the images selection challenge so the reCAPTCHA can be completed only by clicking the "I'm not a Robot". What is the theory of Google for showing the images grid?</p>
  
  <p>I have already read this : <a href="https://stackoverflow.com/questions/29746101/prevent-recaptcha-multiple-image-selections">Prevent reCaptcha multiple image selections</a> but there is not enough information there.</p>
  
  <p>Thanks!</p>
  
  <p>I have included <code>recaptcha/api.js</code> below.</p>
  
  <pre><code>&lt;script src="https://www.google.com/recaptcha/api.js?onload=onloadCallbackAuto&amp;render=explicit&amp;hl=&lt;?php echo $lang;?&gt;" async defer &gt;
  </code></pre>
  
  <p>My reCAPTCHA code is below:</p>
  
  <pre><code>    var onloadCallbackAuto = function() {
           /// do something....
      }
      var verifyCallback = function() {
           /// do something....
      }
      grecaptcha.render('gReCaptchaDiv', {
       'sitekey' : '&lt;?php echo $siteKey;?&gt;',
       'callback' : verifyCallback,
       'theme' : 'light'
      });
  </code></pre>