A kind of map, which gives importance to a specific data set or topic is known as a thematic map. It demonstrates the distribution or population of specific organisms or elements, which is associated with a certain theme or geographical characteristic.
The thematic maps are of different kinds like proportional symbols, choropleth maps, dot maps, and others. The thematic map would most possibly be used to demonstrate the population density of Grizzly bear in Glacier National Park as thematic map helps in showing population.
A "Thematic" map is a type of map specifically designed to show a particular theme connected with a specific geographical area, The answer to your question is a Thematic map.
He picked the P plants because they were easy to work with and they grew relatively fast and they also had characteristics that he could manipulate(Brainliest please)