Question

a. what type of change causes organisms to change their food source, migrate, or hibernate?
phototropism changes
abscission changes
seasonal changes
climate changes

Explanation:

• Phototropism is the growth of plants in response to light, not relevant to the behaviors mentioned.
• Abscission is the shedding of plant parts like leaves, not related to the given organism behaviors.
• Seasonal changes occur regularly (e.g., winter - summer cycles). Many organisms change food sources (e.g., some animals eat different plants in different seasons), migrate (e.g., birds migrating for winter), or hibernate (e.g., bears hibernating in winter) due to seasonal changes.
• Climate change is a long - term shift in climate patterns, not the immediate cause for the common, regular behaviors like migration for winter (which is more related to seasonal changes).

Answer:

seasonal changes