In a Particular Case of Secondary Succession, Three Species of Wild

Multiple Choice

In a particular case of secondary succession, three species of wild grass invaded a field. A fourth species' seeds were also dispersed to this field, but despite being adapted to the abiotic conditions, this fourth species did not establish. A possible factor in this secondary succession was

A) equilibrium.
B) facilitation.
C) immigration.
D) inhibition.
E) parasitism.