Which of the following human activities will have the greatest negative impact on the balance of organisms within an ocean ecosystem? A. mapping of the ocean floor by marine scientists.
B. commercial fishing to provide food for humans
C. recreational boating in rivers, lakes, and streams.
D. monitoring of major global ocean currents

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Grade 91.)the gravitational pull from the moon words).2.) what is the rate of gravitational 3.)if you drop a hammer, is it more likely to drop handle side down, head side down, or equal chance that it will land either way? why? 4.)a car moves 60km east and 90km west.a.) what is the distance the car traveled? b.) what is the car's displacement5.)what is the average velocity of a car that moved 60 km south in 3 hours? 6.) a car starts from rest and acceleration to 60 m/s over a time of 5 seconds. what is the acceleration of the car? 7.)what is the speed of an object at rest?

Which to produce involved from a symbiotic relationship of organisms which resulted in eukaryotic organisms contain chloroplast