BEST ANSWER GETS BRAINLIEST Why is TNT classified as a secondary explosive?

It must be ignited using other explosive materials.
It can be used to help ignite another explosive.
It is very sensitive to heat and friction.
It is easily ignited and explodes quickly.

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

How does upwelling affect coastal fisheries? upwelling damages nutrient supplies at coastal fisheries as the warm, nutrient-rich surface water is replaced by nutrient-poor, cold water. upwelling damages nutrient supplies at coastal fisheries as the cold, nutrient-rich surface water is replaced by nutrient-poor, warm water. upwelling improves the nutrient supply at coastal fisheries as the warm, nutrient-rich surface water replaces the nutrient-poor, cold water. upwelling improves the nutrient supply at coastal fisheries as cold, nutrient-rich water replaces the warm, nutrient-poor surface water.

Which prefix mean under less or below