Which situation is most likely to cause an increase in interspecific competition?

The correct option is

'part a forest is cut down to construct a housing development'

Explanation:

Interspecific competition can be described as the competition which arises between organisms of different species living in an area. On the other hand, intraspecific competition can be described as the competition which arises in organisms of the same species due to limited resources in an area.

When apart of a forest will be cut down, the resources for the organisms living in the forest will become lesser. As a result, the organisms will fight for the limited resources and this will result in interspecific competition.