<p>Hi Yenny,<br>
It seems that they are a charity of some sort (they appear to be largely funded by donations). <br>
All they've done is asked to use your photos on their site, if you agree say yes, if not say no.<br>
The most useful photographer credit to give them would be your name and website. This could be beneficial to you in terms of SEO and driving traffic to your site. If you already have the images, I don't see what you have to lose by sharing your images and getting credit for them. I doubt they'd be willing to pay huge sums of money, but you could ask.<br>
They seem pretty reasonable in the way they've approached you.<br>
Andrew</p>
