Help me ill mark brainlist 1.Analyze the food web. If the frog population decreases, what impact will this likely have on the food web?

A. The food chain will remain unchanged.

b. The population of grasshoppers will decrease.

c. The population of grasshoppers will increase.

d. The population of snakes will increase.

What are the percent by mass of copper in penny lab

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size