Which element provides strength to the exoskeletons of clams and oysters? sulfur oxygen hydrogen phosphorus

The correct answer is Phosphorous.

Clams and oysters have exoskeleton ( skeleton outside their body) that is made up of calcium carbonate, which provide them protection and strength. Phosphorous is the element that helps in providing strength to the exoskeleton.

Thus, phosphorous is the right answer for the question.              

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.

they dont have any evidence