Answer: Universal design for learning
Explanation:
Universal design for learning is described as educational design as regards cognitive basis that guides the development and method of learning environment that can take in individual learning differences. The following are Universal design for learning principles; engagement, representation, action and expression. The main aim for Universal design for learning principles is to produce expert learner's who can get to know their own learning needs, check how they grow and monitor or regulate their interest during the learning process. Examples of universal design for learning are elavator controls, light switch.
I think the toxic sludge is a fine addition. If someone were to remove the toxic sludge then I sure wouldn't be happy. The toxic sludge isn't hurting anybody, why should they remove it? It's the people who are a threat to the toxic sludge, not the other way around.
It’s d special purpose :)) just did this