If both of them were travelling anti parallel to each other. (parallel but in opposite directions)
Used by plants as ammonia
Please mark my answer as brainliest
Answer is
C cancer
Explant
<span>"Hypothesis, because tentative means unsure."
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Answer:Human approach, attitudes and adherence to the safety skills does deal with the impact over environmental factors at a personal level. We have to be more careful and cautious while we pursue our own habits, and activities, with the aim of posing less harm to the environment in any way.
Explanation: