I produced the graph ...

... using this code:
ggplot(df_long, aes(x = Elevation , y = value, color = variable)) +
geom_line() +
facet_wrap(~variable, nrow = 3 ) +
labs(x = c("Elevation" , "Rivers", "NDVI"), y = NULL, color = NULL) +
theme_minimal() +
theme(legend.position = "none", strip.background = element_blank(),
strip.placement = "outside", strip.text.y = element_text(angle = 0),
panel.spacing = unit(1, "lines"))+
coord_cartesian(ylim = c(0, 1))
How I can produce the labels show in the attached image, X are the labels desire to remove. I want to show "Elevation, NDVI and Rivers " on the x axis but only "Elevation is appearing, while I want to show single label for "Ibex, Snow Leopard and Cooccurrence" on right hand side.
similar to one produce by Rota et al 2016enter image description here