Answer:
Spread further north
Explanation:
The prevalence of Loblolly pine in the southeastern US is probably associated with the temperature of this region, as this plant requires a minimum temperature to survive and pre-thrive. As the US is a large country, we know that there is a variation in temperature across the country and this makes it difficult for Loblolly pine to grow in places other than the south east. However, if average temperatures rise in the United States, we can expect Loblolly pine to begin to spread to the north, as rising temperatures would bring the northern temperature closer to the southeast temperature under normal conditions.