Suppose that we have four descriptive features to train our predictive model. To determine which features to select we decide to (i) train a model on each feature individually and (ii) calculate the Pearson correlation between each feature.  

The accuracy obtained for each model where 0.9, 0.85, 0.7 and 0.6 respectively, while the correlations between features were as follows:

 Given the information, which features would you select if you can only select a single feature?