When having in mind the meaning of a direct observation, we can state that is the method of collecting information for a study by watching the subject directly without making any changes to its natural habitat. based on that we know that the best option is the last one: <span>determining the seal population of an island by counting seals in 10 square meters of the island. I know this is going to be helpful</span>
Yes you also can you a encyclopedia to.
The adverb is slowly, Because adverbs tell what kind, how or to what extent. The adverb slowly (usually, they end in ly) is describing HOW someone did something. EX. Jessie ran slowly across the field. It tells how jessie ran.
And adverbs describe a verb.
