Some plants release toxic chemicals that kill or harm nearby plants. what type of example is this? 1 cooperation 2.mutualism 3.competition or 4.parasitism

I would say parasitism because it brings harm to its host.

The situation above is an example of C. Competition.

When these plants release the toxic chemicals and harms and/or kills the nearby plants, it makes more room for the plant releasing the chemicals. In doing so, the toxic releasing plant then has more room to prosper, and higher chances of getting food and water. Thus making C. the answer.

I hope this helps!

it cools slower in the earth meaning the crystals have more time to form than lava on the surface