Answer: D) The effect of gravity on an object
Explanation: We're not talking about mass, we're talking about weight. Weight is measured by the force of gravity on a object. For examples, you might be 100 pounds on Earth but 12 pounds on the moon.
The answer is either D or B. hope this helps.
Answer:
The study is called ecology
Explanation:
Mark as brainliest if I'm correct
Their proton and electron numbers are same
Grass contains water and sheep need water.
