(Q).
Cutting down trees has a negative impact on an ecosystem, and an ecosystem can be in a desert, a tropical jungle, an ocean or a pond. Given these facts, what type of impact does cutting down trees have on jungles among the following options: - dangerous - negative - uncontrolled - mechanical - unpredictable - growing - positive - Pollution
(A).
negative

(Q).
Plasma is formed by electrons separating from atoms in stars, and plasma is more common in stars, because making plasma requires high temperatures. Given these facts, under what conditions does plasma form among the following options: - cold weather - under water - hydrogen and oxygen - windy plains - high temperatures - It gets heated up - nucleus of a cell - flow of electrons
(A).
high temperatures

(Q).
Caffeine is a central nervous system stimulant, and stimulants can cause overheating and dehydration. Given these facts, caffeine can cause among the following options: - congestion - anemia - constipation - sweating - hives - energy usage - dehydration - heat energy
(A).
dehydration