Adifference between two groups in an observational study that can explain why the outcomes were very different between the groups is called what?

A confounding variable

Explanation:

A confounding variable is an element, other than the investigated treatment, that may affect the measured outcome of an assay.

The confounding variable occurs when the association observed derives, at least in part, from differences between groups other than the exposure under study, which affect the risk of presenting the outcome of interest.

The correct answer is:

B) Creating medicine requires large amounts of resources, and harvesting these resources is leading to deforestation of the Amazon.

Explanation:

Global rainforests exist as the treasures for fighting against and curing various types of diseases. But because this needs more resources and the consumers obtain the medicines from the plants since very long, this consumption of the plants for the medication purpose is leading to the deforestation of different species of plants. Just because of this greater use of these medicinal plants, the current high pace of deforestation and species eradication has happened now and it has been proved difficult to tap the rainforests’ nearly unlimited, endless and infinite resources anytime soon.