Fill in the blanks
| Species A | Species B | Type of interaction | Example |
| + | - | ......B...... | .....D.... |
| + | + | .......C....... | ......E..... |
| + | ......A...... | Commensalism | ....F..... |
| Species A | Species B | Type of interaction | Example |
| + | . | Predation | Rabbit and lion |
| + | + | Mutualism | Lichen |
| + | 0 | Commensalism | Egrets and cattle |