The person who performs the action is the child. So the answer is A
Exploring the ocean is difficult and expensive so many parts of the ocean remain a mystery.
1. a lifestyle of tending livestock in open pasture land: pastoral
2. a lifestyle of wandering from place to place in search of pasture or water: nomadic
3. a type of religion that believes in one god : monotheism
4. a long narrative poem in elevated language celebrating the life of heroes: epic
5. people groups that are native to a region : indigineous
6. moving from one place to another for any number of reason: migration
7. a society based on agriculture : agrarian
8-the process of settling down in one location: sedentary
It relates to the actual meaning which is "<span>a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change."</span>
