Hi there, @AmohelangMabaso ...
I cannot be 100% certain of this, but based on a quick Google search and by looking at your Community profile, it looks like you attend Home - Wits University. On their website, I found the following page: ulwazi - Wits University. Just based on the first paragraph on that page, it appears to me that "ulwazi" and Canvas are one in the same. Wits University may have decided to re-name/re-brand Canvas as "ulwazi" for some reason, but I do not know what that reason would be. You may want to use the e-mail address displayed on the left side of this page to get technical assistance if you have any further questions about their name. So, I hope this will help in some way.
On a slightly different note, I am not sure why you have a subject title of "climate change" here. I'm assuming this was an overlook on your part and meant to have a subject line related to your question.
Take care...be well.