How to interpreted results on a principal components analysis (PCA)?

#1
Which of the two is the correct interpretation?
a) the canideos (pink) have higher values of II-P relative to other groups?
b) The canideos (pink) have higher variability of II-P in relation to the other groups?

What is the meaning of a negative coefficient in realtion to PC1 and PC2 (equinos, in red)?
 

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