How will the addition of water affect the acidity of a highly acidic solution having ph 2?

there will be a slight decrease in the ph value.
there will be a slight increase in the ph value.
the ph value will remain constant.

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?