PLEASE ANSWER ASAP Read the paragraph.

(1) In the global news recently, there has been a push to send a piloted mission to Mars. (2) But scientific experts argue that sending people is unnecessary. (3) They site advances in robotics and engineering which makes sending people into space obsolete. (4) Instead, all that money and human energy should be focused on studying the Earth’s oceans.

Which sentence contains grammar and usage errors and needs revision?

sentence 1
sentence 2
sentence 3
sentence 4

Read the excerpt from "the most dangerous game." again rainsford lifted the heavy knocker, and let it fall. the door opened then, opened as suddenly as if it were on a spring, and rainsford stood blinking in the river of glaring gold light that poured out. the first thing rainsford's eyes discerned was the largest man rainsford had ever seen—a gigantic creature, solidly made and black bearded to the waist. in his hand the man held a long-barreled revolver, and he was pointing it straight at rainsford's heart. the details of this excerpt show that rainsford sees ivan as a(n) individual.