James is a researcher examining the effects of vitamin d deficiency on mood. based on everything he has read, he speculates that if an individual has a low vitamin d level, then he/she may experience changes in mood. james's speculation can also be described as a

James' speculations can be described as a casual hypothesis. It is because he tries to formulate intelligent guesses base on the information that he had receive in which it describes that he is formulating the hypothesis. A hypothesis is a way of making an intelligent or an educated guess in specific thing before the person experiments it on and test if his or her guess were true or valid.

It’s because it’s was very fun