Which of these factors that effect the atmosphere and global climate can be linked to human activities that effect the atmosphere and global climate can be linked to human activities

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

Could someone me with number one you

Which of the following statements are true chromosomes make up genes