What is a more accurate way to make an observation of an object than with your senses alone?
a. use an appropriate tool to make the same observation
b. make a prediction from previous data
c. make an inference from other observations
d. avoid the use of mathematical equations in recording your observation

An observation can be acquired using the senses. In other words, observations can be seen, heard, tasted, smelled, and touched. It should be evident right there. It can also be made using tools that can measure the intensity of color, texture and any physical characteristics. These tools strengthen the credibility because human senses can be objective. But with these tools, it follows quality standards. However, an inference or a hypothesis is based on concept of causality. This is not an observation, but it came from one. Hence, from the choices, the answer is letter A.

On the galapagos islands charles studied finches